The wildlife at Grand Canyon National Park is beautiful and diverse. There are a variety of amphibians, birds, fish, mammals, reptiles, and plants to explore. Check out all the incredible species this park has to offer!
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Grand Canyon National Park Species List
| Amphibians | Birds | Fish | Mammals | Reptiles | Plants |
Amphibians
Great Plains Toad | Photo Credit: Jessica Rockeman 
Red-spotted Toad | Photo Credit: Skeeze
| Amphibian Name | Scientific Name | Abundance | Nativeness |
| Arizona Tiger Salamander | Ambystoma mavortium nebulosum | Rare | Native |
| Canyon Treefrog | Hyla arenicolor | Abundant | Native |
| Great Basin Spadefoot Toad | Spea intermontana | Uncommon | Native |
| Great Plains Toad | Anaxyrus cognatus | Rare | Native |
| Lowland Leopard Frog, Yavapai Frog, Yavapai Leopard Frog | Lithobates yavapaiensis | Rare | Native |
| Red-spotted Toad | Anaxyrus punctatus | Abundant | Native |
| Tiger Salamander, Utah Tiger Salamander | Ambystoma tigrinum | Uncommon | Native |
| Western Spadefoot | Spea hammondii | Unknown | Native |
| Woodhouse’s Toad | Anaxyrus woodhousii woodhousii | Abundant | Native |
| Amphibians | Birds | Fish | Mammals | Reptiles | Plants |
Birds
Barn Swallow | Photo Credit: Denise Coyle 
Condor Fledged at Grand Canyon, Grand Canyon National Park, Arizona | Photo Credit: Chad Olson, NPS
| Bird Name | Scientific Name | Abundance | Nativeness |
| [Common Name Unknown] | Leiothlypis celata orestera | Uncommon | Native |
| [Common Name Unknown] | Vireo olivaceus olivaceus | Occasional | Native |
| [Common Name Unknown] | Vireo plumbeus plumbeus | Common | Native |
| Acorn Woodpecker | Melanerpes formicivorus | Uncommon | Native |
| American Avocet | Recurvirostra americana | Uncommon | Native |
| American Bittern | Botaurus lentiginosus | Occasional | Native |
| American Coot | Fulica americana | Common | Native |
| American Crow | Corvus brachyrhynchos | Rare | Native |
| American Dipper | Cinclus mexicanus | Common | Native |
| American Dipper | Cinclus mexicanus unicolor | Common | Native |
| American Goldfinch | Spinus tristis | Uncommon | Native |
| American Kestrel | Falco sparverius | Common | Native |
| American Kestrel | Falco sparverius sparverius | Common | Native |
| American Peregrine Falcon | Falco peregrinus anatum | Common | Native |
| American Pipit | Anthus rubescens | Uncommon | Native |
| American Redstart | Setophaga ruticilla | Occasional | Native |
| American Robin | Turdus migratorius | Abundant | Native |
| American Robin | Turdus migratorius propinquus | Abundant | Native |
| American Three-toed Woodpecker | Picoides dorsalis | Uncommon | Native |
| American Tree Sparrow | Spizella arborea | Occasional | Native |
| American White Pelican | Pelecanus erythrorhynchos | Rare | Native |
| American Wigeon | Anas americana | Abundant | Native |
| American Yellow Warbler | Setophaga aestiva | Common | Native |
| Anna’s Hummingbird | Calypte anna | Occasional | Native |
| Ash-throated Flycatcher | Myiarchus cinerascens | Common | Native |
| Ash-throated Flycatcher | Myiarchus cinerascens cinerascens | Common | Native |
| Baird’s Sandpiper | Calidris bairdii | Occasional | Native |
| Bald Eagle | Haliaeetus leucocephalus | Uncommon | Native |
| Band-tailed Pigeon | Patagioenas fasciata | Uncommon | Native |
| Band-tailed Pigeon | Patagioenas fasciata fasciata | Uncommon | Native |
| Bank Swallow | Riparia riparia | Rare | Native |
| Barn Owl | Tyto alba | Occasional | Native |
| Barn Swallow | Hirundo rustica | Uncommon | Native |
| Barrow’s Goldeneye | Bucephala islandica | Common | Native |
| Bay-breasted Warbler | Setophaga castanea | Occasional | Native |
| Bell’s Vireo | Vireo bellii | Common | Native |
| Belted Kingfisher | Megaceryle alcyon | Uncommon | Native |
| Bendire’s Thrasher, Cuitlacoche pico corto | Toxostoma bendirei | Uncommon | Native |
| Bewick’s Wren | Thryomanes bewickii | Common | Native |
| Bewick’s Wren | Thryomanes bewickii eremophilus | Common | Native |
| Black Rosy-finch, Rosy-finch | Leucosticte atrata | Occasional | Native |
| Black Tern | Chlidonias niger | Occasional | Native |
| Black-and-white Warbler | Mniotilta varia | Occasional | Native |
| Black-billed Magpie | Pica hudsonia | Occasional | Native |
| Black-chinned Hummingbird | Archilochus alexandri | Common | Native |
| Black-chinned Sparrow | Spizella atrogularis | Common | Native |
| Black-crowned Night-Heron | Nycticorax nycticorax | Uncommon | Native |
| Black-headed Grosbeak | Pheucticus melanocephalus | Common | Native |
| Black-headed Grosbeak | Pheucticus melanocephalus melanocephalus | Common | Native |
| Black-necked Stilt | Himantopus mexicanus | Rare | Native |
| Blackpoll Warbler | Setophaga striata | Occasional | Native |
| Black-tailed Gnatcatcher | Polioptila melanura | Uncommon | Native |
| Black-throated Blue Warbler | Setophaga caerulescens | Occasional | Native |
| Black-throated Gray Warbler | Setophaga nigrescens | Common | Native |
| Black-throated Gray Warbler | Setophaga nigrescens halseii | Common | Native |
| Black-throated Green Warbler | Setophaga virens | Occasional | Native |
| Black-throated Sparrow | Amphispiza bilineata | Common | Native |
| Black-throated Sparrow | Amphispiza bilineata deserticola | Common | Native |
| Blue Grosbeak | Passerina caerulea | Common | Native |
| Blue Grosbeak | Passerina caerulea interfusa | Common | Native |
| Blue Grouse | Dendragapus obscurus obscurus | Uncommon | Native |
| Blue Jay | Cyanocitta cristata | Occasional | Native |
| Blue-gray Gnatcatcher | Polioptila caerulea | Common | Native |
| Blue-gray Gnatcatcher | Polioptila caerulea amoenissima | Common | Native |
| Blue-gray Gnatcatcher | Polioptila caerulea obscura | Common | Native |
| Blue-winged Teal | Anas discors | Uncommon | Native |
| Bobolink | Dolichonyx oryzivorus | Occasional | Native |
| Bohemian Waxwing | Bombycilla garrulus | Occasional | Native |
| Bonaparte’s Gull | Chroicocephalus philadelphia | Occasional | Native |
| Brewer’s Blackbird | Euphagus cyanocephalus | Common | Native |
| Brewer’s Sparrow | Spizella breweri | Common | Native |
| Bridled Titmouse | Baeolophus wollweberi | Occasional | Native |
| Broad-tailed Hummingbird | Selasphorus platycercus | Common | Native |
| Broad-winged Hawk | Buteo platypterus | Rare | Native |
| Bronzed Cowbird | Molothrus aeneus | Occasional | Native |
| Brown Creeper | Certhia americana | Common | Native |
| Brown Creeper | Certhia americana montana | Common | Native |
| Brown Pelican | Pelecanus occidentalis | Occasional | Native |
| Brown Thrasher | Toxostoma rufum | Occasional | Native |
| Brown-crested Flycatcher | Myiarchus tyrannulus | Rare | Native |
| Brown-headed Cowbird | Molothrus ater | Common | Non-native |
| Brown-headed Cowbird | Molothrus ater obscurus | Common | Non-native |
| Bufflehead | Bucephala albeola | Abundant | Native |
| Bullock’s Oriole, Northern Oriole | Icterus bullockii | Uncommon | Native |
| Burrowing Owl | Athene cunicularia | Rare | Native |
| Bushtit | Psaltriparus minimus | Common | Native |
| Bushtit | Psaltriparus minimus plumbeus | Common | Native |
| Cackling Goose | Branta hutchinsii | Occasional | Native |
| Cactus Wren | Campylorhynchus brunneicapillus | Uncommon | Native |
| California Condor | Gymnogyps californianus | Common | Native |
| California Gull | Larus californicus | Occasional | Native |
| Calliope Hummingbird | Stellula calliope | Uncommon | Native |
| Canada Goose | Branta canadensis | Common | Native |
| Canvasback | Aythya valisineria | Uncommon | Native |
| Canyon Towhee | Melozone fusca | Uncommon | Native |
| Canyon Wren | Catherpes mexicanus | Common | Native |
| Caspian Tern | Hydroprogne caspia | Occasional | Native |
| Cassin’s Finch | Haemorhous cassinii | Common | Native |
| Cassin’s Kingbird | Tyrannus vociferans | Common | Native |
| Cassin’s Vireo, Solitary Vireo | Vireo cassinii | Uncommon | Native |
| Cattle Egret | Bubulcus ibis | Rare | Native |
| Cedar Waxwing | Bombycilla cedrorum | Uncommon | Native |
| Chestnut-sided Warbler | Setophaga pensylvanica | Occasional | Native |
| Chipping Sparrow | Spizella passerina | Common | Native |
| Chipping Sparrow | Spizella passerina arizonae | Common | Native |
| Chukar, Chukar Partridge | Alectoris chukar | Uncommon | Non-native |
| Cinnamon Teal | Anas cyanoptera | Uncommon | Native |
| Clapper Rail | Rallus longirostris | Occasional | Native |
| Clark’s Grebe | Aechmophorus clarkii | Common | Native |
| Clark’s Nutcracker | Nucifraga columbiana | Common | Native |
| Clay-colored Sparrow | Spizella pallida | Occasional | Native |
| Cliff Swallow | Petrochelidon pyrrhonota | Rare | Native |
| Common Black Hawk, Common Black-Hawk | Buteogallus anthracinus | Occasional | Native |
| Common Gallinule | Gallinula galeata | Occasional | Native |
| Common Goldeneye | Bucephala clangula | Abundant | Native |
| Common Grackle | Quiscalus quiscula | Occasional | Native |
| Common Ground Dove, Common Ground-Dove | Columbina passerina | Occasional | Native |
| Common Loon, Great Northern Diver, Great Northern Loon | Gavia immer | Rare | Native |
| Common Merganser | Mergus merganser | Common | Native |
| Common Nighthawk | Chordeiles minor | Common | Native |
| Common Nighthawk | Chordeiles minor henryi | Common | Native |
| Common Poorwill | Phalaenoptilus nuttallii | Common | Native |
| Common Poorwill | Phalaenoptilus nuttallii nuttallii | Common | Native |
| Common Raven | Corvus corax | Abundant | Native |
| Common Redpoll | Acanthis flammea | Occasional | Native |
| Common Snipe | Gallinago gallinago | Uncommon | Native |
| Common Tern | Sterna hirundo | Occasional | Native |
| Common Yellowthroat | Geothlypis trichas | Common | Native |
| Common Yellowthroat | Geothlypis trichas campicola | Common | Native |
| Cooper’s Hawk | Accipiter cooperii | Common | Native |
| Cordilleran Flycatcher | Empidonax occidentalis | Uncommon | Native |
| Costa’s Hummingbird | Calypte costae | Common | Native |
| Crissal Thrasher | Toxostoma crissale | Uncommon | Native |
| Dark-eyed Junco | Junco hyemalis | Common | Native |
| Dark-eyed Junco (Cassiar) | Junco hyemalis cismontanus | Native | |
| Dark-eyed Junco (Gray-headed race) | Junco hyemalis caniceps | Common | Native |
| Dark-eyed Junco (Oregon race) | Junco hyemalis shufeldti | Common | Native |
| Dark-eyed Junco (Oregon race) | Junco hyemalis thurberi | Common | Native |
| Dark-eyed Junco (Pink-sided race) | Junco hyemalis mearnsi | Common | Native |
| Dark-eyed Junco (Red-backed) | Junco hyemalis dorsalis | Native | |
| Dark-eyed Junco (Slate-colored race) | Junco hyemalis hyemalis | Uncommon | Native |
| Dickcissel | Spiza americana | Occasional | Native |
| Double-crested Cormorant | Phalacrocorax auritus | Occasional | Native |
| Downy Woodpecker | Picoides pubescens | Rare | Native |
| Dunlin | Calidris alpina | Occasional | Native |
| Dusky Flycatcher | Empidonax oberholseri | Uncommon | Native |
| Dusky Grouse, Blue Grouse | Dendragapus obscurus | Uncommon | Native |
| Eared Grebe | Podiceps nigricollis | Uncommon | Native |
| Eastern Bluebird | Sialia sialis | Occasional | Native |
| Eastern Kingbird | Tyrannus tyrannus | Occasional | Native |
| Eastern Meadowlark | Sturnella magna | Uncommon | Native |
| Eastern Phoebe | Sayornis phoebe | Occasional | Native |
| Eurasian Collared-Dove | Streptopelia decaocto | Common | Non-native |
| Eurasian Teal, Green-winged Teal | Anas crecca | Common | Native |
| Eurasian Wigeon | Anas penelope | Occasional | Unknown |
| European Herring Gull, Herring Gull | Larus argentatus | Occasional | Native |
| European Starling | Sturnus vulgaris | Uncommon | Non-native |
| Evening Grosbeak | Hesperiphona vespertina | Occasional | Native |
| Evening Grosbeak | Hesperiphona vespertina brooksi | Occasional | Native |
| Evening Grosbeak | Hesperiphona vespertina montana | Occasional | Native |
| Ferruginous Hawk | Buteo regalis | Uncommon | Native |
| Flammulated Owl | Otus flammeolus | Common | Native |
| Forster’s Tern | Sterna forsteri | Occasional | Native |
| Fox Sparrow | Passerella iliaca | Occasional | Native |
| Franklin’s Gull | Larus pipixcan | Occasional | Native |
| Gadwall | Anas strepera | Abundant | Native |
| Gambel’s Quail | Callipepla gambelii | Common | Native |
| Golden Eagle | Aquila chrysaetos | Uncommon | Native |
| Golden-crowned Kinglet | Regulus satrapa | Rare | Native |
| Golden-crowned Kinglet | Regulus satrapa olivaceus | Rare | Native |
| Golden-crowned Sparrow | Zonotrichia atricapilla | Rare | Native |
| Golden-winged Warbler | Vermivora chrysoptera | Occasional | Native |
| Grace’s Warbler | Setophaga graciae | Common | Native |
| Grasshopper Sparrow | Ammodramus savannarum | Occasional | Native |
| Grasshopper Sparrow | Ammodramus savannarum perpallidus | Occasional | Native |
| Gray Catbird, Grey Catbird | Dumetella carolinensis | Occasional | Native |
| Gray Flycatcher | Empidonax wrightii | Common | Native |
| Gray Vireo | Vireo vicinior | Common | Native |
| Great Blue Heron | Ardea herodias | Common | Native |
| Great Egret | Ardea alba | Rare | Native |
| Great Grey Shrike, Northern Shrike | Lanius excubitor | Occasional | Native |
| Great Horned Owl | Bubo virginianus | Common | Native |
| Great Horned Owl | Bubo virginianus pacificus | Common | Native |
| Great Horned Owl | Bubo virginianus pallescens | Common | Native |
| Greater Pewee | Contopus pertinax | Occasional | Native |
| Greater Roadrunner | Geococcyx californianus | Uncommon | Native |
| Greater Sage Grouse, Greater Sage-Grouse, Sage Grouse | Centrocercus urophasianus | Occasional | Native |
| Greater Scaup | Aythya marila | Occasional | Unknown |
| Greater White-fronted Goose | Anser albifrons | Occasional | Native |
| Greater Yellowlegs | Tringa melanoleuca | Occasional | Native |
| Great-tailed Grackle | Quiscalus mexicanus | Common | Unknown |
| Green Heron, Green-backed Heron | Butorides virescens | Rare | Native |
| Green-tailed Towhee | Pipilo chlorurus | Common | Native |
| Groove-billed Ani | Crotophaga sulcirostris | Occasional | Native |
| Hairy Woodpecker | Picoides villosus | Common | Native |
| Hammond’s Flycatcher | Empidonax hammondii | Occasional | Native |
| Harlequin Duck | Histrionicus histrionicus | Occasional | Native |
| Harris’ Sparrow, Harris’s Sparrow | Zonotrichia querula | Occasional | Native |
| Hepatic Tanager | Piranga flava | Uncommon | Native |
| Hermit Thrush | Catharus guttatus | Common | Native |
| Hermit Warbler | Setophaga occidentalis | Rare | Native |
| Hooded Merganser | Lophodytes cucullatus | Uncommon | Native |
| Hooded Oriole | Icterus cucullatus | Common | Native |
| Hooded Warbler | Setophaga citrina | Occasional | Native |
| Horned Grebe | Podiceps auritus | Occasional | Native |
| Horned Lark | Eremophila alpestris | Common | Native |
| Horned Lark | Eremophila alpestris enthymia | Common | Native |
| Horned Lark | Eremophila alpestris leucolaema | Common | Native |
| Horned Lark | Eremophila alpestris occidentalis | Common | Native |
| House Finch | Haemorhous mexicanus | Common | Native |
| House Finch | Haemorhous mexicanus frontalis | Common | Native |
| House Sparrow | Passer domesticus | Common | Native |
| House Wren | Troglodytes aedon | Common | Native |
| House Wren | Troglodytes aedon parkmanii | Common | Native |
| Hutton’s Vireo | Vireo huttoni | Occasional | Native |
| Inca Dove | Columbina inca | Occasional | Native |
| Indigo Bunting | Passerina cyanea | Rare | Native |
| Jaegers | Stercorarius | Occasional | Native |
| Juniper Titmouse | Baeolophus ridgwayi ridgwayi | Common | Native |
| Juniper Titmouse, Plain Titmouse | Baeolophus ridgwayi | Common | Native |
| Kentucky Warbler | Geothlypis formosa | Occasional | Native |
| Killdeer | Charadrius vociferus | Uncommon | Native |
| Ladder-backed Woodpecker | Picoides scalaris | Rare | Native |
| Lark Bunting | Calamospiza melanocorys | Occasional | Native |
| Lark Sparrow | Chondestes grammacus | Common | Native |
| Lark Sparrow | Chondestes grammacus strigatus | Common | Native |
| Lawrence’s Goldfinch | Spinus lawrencei | Occasional | Native |
| Lazuli Bunting | Passerina amoena | Common | Native |
| Least Bittern | Ixobrychus exilis | Occasional | Native |
| Least Sandpiper | Calidris minutilla | Occasional | Native |
| Lesser Goldfinch | Spinus psaltria | Common | Native |
| Lesser Goldfinch | Spinus psaltria hesperophilus | Common | Native |
| Lesser Nighthawk | Chordeiles acutipennis | Rare | Native |
| Lesser Scaup | Aythya affinis | Abundant | Native |
| Lesser Yellowlegs | Tringa flavipes | Occasional | Native |
| Lewis’s Woodpecker | Melanerpes lewis | Rare | Native |
| Lincoln’s Sparrow | Melospiza lincolnii | Uncommon | Native |
| Lincoln’s Sparrow | Melospiza lincolnii lincolnii | Uncommon | Native |
| Little Willow Flycatcher | Empidonax traillii brewsteri | Rare | Native |
| Loggerhead Shrike | Lanius ludovicianus | Uncommon | Native |
| Loggerhead Shrike | Lanius ludovicianus excubitorides | Uncommon | Native |
| Long-billed Curlew | Numenius americanus | Occasional | Native |
| Long-billed Dowitcher | Limnodromus scolopaceus | Occasional | Native |
| Long-eared Owl | Asio otus | Occasional | Native |
| Long-tailed Duck | Clangula hyemalis | Rare | Native |
| Lucy’s Warbler | Leiothlypis luciae | Common | Native |
| MacGillivray’s Warbler | Geothlypis tolmiei | Rare | Native |
| Magnificent Frigatebird | Fregata magnificens | Occasional | Native |
| Magnificent Hummingbird | Eugenes fulgens | Rare | Native |
| Magnolia Warbler | Setophaga magnolia | Occasional | Native |
| Mallard | Anas platyrhynchos | Common | Native |
| Mangrove Warbler, Yellow Warbler | Setophaga petechia | Common | Native |
| Marbled Godwit | Limosa fedoa | Occasional | Native |
| Marsh Wren | Cistothorus palustris | Common | Native |
| Merlin | Falco columbarius | Rare | Native |
| Merlin | Falco columbarius columbarius | Occasional | Native |
| Mexican Spotted Owl | Strix occidentalis lucida | Uncommon | Native |
| Mexican Whip-poor-will | Caprimulgus vociferus arizonae | Rare | Native |
| Mountain Bluebird | Sialia currucoides | Common | Native |
| Mountain Chickadee | Poecile gambeli | Abundant | Native |
| Mourning Dove | Zenaida macroura | Common | Native |
| Mourning Dove | Zenaida macroura marginella | Common | Native |
| Nashville Warbler | Leiothlypis ruficapilla | Common | Native |
| Neotropic Cormorant | Phalacrocorax brasilianus | Occasional | Native |
| Northern Flicker | Colaptes auratus | Common | Native |
| Northern Flicker | Colaptes auratus cafer | Common | Native |
| Northern Flicker | Colaptes auratus luteus | Common | Native |
| Northern Goshawk | Accipiter gentilis | Common | Native |
| Northern Harrier | Circus cyaneus | Uncommon | Native |
| Northern Mockingbird | Mimus polyglottos | Uncommon | Native |
| Northern Oriole, Baltimore Oriole | Icterus galbula | Occasional | Native |
| Northern Parula | Setophaga americana | Occasional | Native |
| Northern Pintail | Anas acuta | Uncommon | Native |
| Northern Pygmy-Owl | Glaucidium gnoma | Rare | Native |
| Northern Rough-winged Swallow | Stelgidopteryx serripennis | Rare | Native |
| Northern Saw-whet Owl | Aegolius acadicus | Occasional | Native |
| Northern Shoveler | Anas clypeata | Uncommon | Native |
| Northern Waterthrush | Parkesia noveboracensis | Rare | Native |
| Olive Warbler | Peucedramus taeniatus | Occasional | Native |
| Olive-sided Flycatcher | Contopus cooperi | Uncommon | Native |
| Orange-crowned Warbler | Leiothlypis celata | Uncommon | Native |
| Orchard Oriole | Icterus spurius | Occasional | Native |
| Osprey | Pandion haliaetus | Common | Native |
| Ovenbird | Seiurus aurocapilla | Occasional | Native |
| Pacific Diver, Pacific Loon | Gavia pacifica | Occasional | Native |
| Pacific Wren | Troglodytes pacificus | Uncommon | Native |
| Pacific-Slope Flycatcher, Western Flycatcher | Empidonax difficilis | Unknown | Native |
| Pacific-Slope Flycatcher, Western Flycatcher | Empidonax difficilis difficilis | Uncommon | Native |
| Painted Bunting | Passerina ciris | Occasional | Native |
| Painted Redstart, Painted Whitestart | Myioborus pictus | Occasional | Native |
| Palm Warbler | Setophaga palmarum | Occasional | Native |
| Pectoral Sandpiper | Calidris melanotos | Occasional | Native |
| Peregrine Falcon | Falco peregrinus | Common | Native |
| Phainopepla | Phainopepla nitens | Uncommon | Native |
| Philadelphia Vireo | Vireo philadelphicus | Occasional | Native |
| Pied-billed Grebe | Podilymbus podiceps | Uncommon | Native |
| Pileated Woodpecker | Dryocopus pileatus | Occasional | Native |
| Pine Grosbeak | Pinicola enucleator montana | Occasional | Native |
| Pine Siskin | Pinicola enucleator | Occasional | Native |
| Pine Siskin | Spinus pinus | Common | Native |
| Pine Siskin | Spinus pinus pinus | Common | Native |
| Pinyon Jay | Gymnorhinus cyanocephalus | Abundant | Native |
| Plumbeous Vireo | Vireo plumbeus | Common | Native |
| Prairie Falcon | Falco mexicanus | Rare | Native |
| Prairie Warbler | Setophaga discolor | Occasional | Native |
| Prothonotary Warbler | Protonotaria citrea | Occasional | Native |
| Purple Finch | Haemorhous purpureus | Occasional | Native |
| Purple Finch | Haemorhous purpureus californicus | Occasional | Native |
| Purple Martin | Progne subis | Occasional | Native |
| Pygmy Nuthatch | Sitta pygmaea | Common | Native |
| Pygmy Nuthatch | Sitta pygmaea melanotis | Common | Native |
| Red Crossbill | Loxia curvirostra | Occasional | Native |
| Red Crossbill | Loxia curvirostra bendirei | Occasional | Native |
| Red Crossbill | Loxia curvirostra grinnelli | Occasional | Native |
| Red Crossbill | Loxia curvirostra stricklandi | Occasional | Native |
| Red-breasted Merganser | Mergus serrator | Occasional | Native |
| Red-breasted Nuthatch | Sitta canadensis | Uncommon | Native |
| Red-breasted Sapsucker | Sphyrapicus ruber | Occasional | Native |
| Red-eyed Vireo | Vireo olivaceus | Occasional | Native |
| Red-faced Warbler | Cardellina rubrifrons | Uncommon | Native |
| Redhead | Aythya americana | Common | Native |
| Red-naped Sapsucker | Sphyrapicus nuchalis | Uncommon | Native |
| Red-necked Grebe | Podiceps grisegena | Occasional | Native |
| Red-necked Phalarope | Phalaropus lobatus | Rare | Native |
| Red-shouldered Hawk | Buteo lineatus | Occasional | Native |
| Red-tailed Hawk | Buteo jamaicensis | Common | Native |
| Red-winged Blackbird | Agelaius phoeniceus | Occasional | Native |
| Ring-billed Gull | Larus delawarensis | Rare | Native |
| Ring-necked Duck | Aythya collaris | Common | Native |
| Rock Pigeon, Rock Dove | Columba livia | Uncommon | Native |
| Rock Wren | Salpinctes obsoletus | Common | Native |
| Rose-breasted Grosbeak | Pheucticus ludovicianus | Rare | Native |
| Ross’ Goose | Chen rossii | Occasional | Native |
| Rough-legged Hawk | Buteo lagopus | Rare | Native |
| Ruby-crowned Kinglet | Regulus calendula | Common | Native |
| Ruby-crowned Kinglet | Regulus calendula calendula | Common | Native |
| Ruddy Duck | Oxyura jamaicensis | Rare | Native |
| Rufous Hummingbird | Selasphorus rufus | Common | Native |
| Rufous-backed Robin | Turdus rufopalliatus | Occasional | Native |
| Rufous-crowned Sparrow | Aimophila ruficeps | Uncommon | Native |
| Rufous-crowned Sparrow | Aimophila ruficeps scottii | Uncommon | Native |
| Rusty Blackbird | Euphagus carolinus | Occasional | Native |
| Sabine’s Gull | Xema sabini | Occasional | Native |
| Sage Sparrow | Artemisiospiza belli | Uncommon | Native |
| Sage Sparrow | Artemisiospiza nevadensis | Uncommon | Native |
| Sage Thrasher | Oreoscoptes montanus | Uncommon | Native |
| Sanderling | Calidris alba | Occasional | Native |
| Sandhill Crane | Grus canadensis | Occasional | Native |
| Savannah Sparrow | Passerculus sandwichensis | Uncommon | Native |
| Savannah Sparrow | Passerculus sandwichensis nevadensis | Uncommon | Native |
| Say’s Phoebe | Sayornis nigricans | Common | Native |
| Say’s Phoebe | Sayornis saya | Common | Native |
| Say’s Phoebe | Sayornis saya saya | Common | Native |
| Scarlet Tanager | Piranga olivacea | Occasional | Native |
| Scissor-tailed Flycatcher | Tyrannus forficatus | Occasional | Native |
| Scott’s Oriole | Icterus parisorum | Common | Native |
| Semipalmated Plover | Charadrius semipalmatus | Occasional | Native |
| Sharp-shinned Hawk | Accipiter striatus | Common | Native |
| Snow Goose | Chen caerulescens | Occasional | Native |
| Snowy Egret | Egretta thula | Rare | Native |
| Snowy Plover | Charadrius nivosus | Occasional | Native |
| Solitary Sandpiper | Tringa solitaria | Uncommon | Native |
| Solitary Sandpiper | Tringa solitaria cinnamomea | Occasional | Native |
| Song Sparrow | Melospiza melodia | Common | Native |
| Song Sparrow | Melospiza melodia montana | Common | Native |
| Sora | Porzana carolina | Rare | Native |
| Southwestern Willow Flycatcher | Empidonax traillii extimus | Rare | Native |
| Spotted Owl | Strix occidentalis | Uncommon | Native |
| Spotted Sandpiper | Actitis macularius | Common | Native |
| Spotted Towhee | Pipilo maculatus | Common | Native |
| Spotted Towhee | Pipilo maculatus montanus | Common | Native |
| Steller’s Jay | Cyanocitta stelleri | Common | Native |
| Streak-backed Oriole | Icterus pustulatus | Occasional | Native |
| Summer Tanager | Piranga rubra | Uncommon | Native |
| Surf Scoter | Melanitta perspicillata | Occasional | Native |
| Swainson’s Hawk | Buteo swainsoni | Uncommon | Native |
| Swainson’s Thrush | Catharus ustulatus | Occasional | Native |
| Swamp Sparrow | Melospiza georgiana | Rare | Native |
| Tennessee Warbler | Oreothlypis peregrina | Occasional | Native |
| Townsend’s Warbler | Setophaga townsendi | Occasional | Native |
| Townsend’s Solitaire | Myadestes townsendi | Common | Native |
| Tree Swallow | Tachycineta bicolor | Rare | Native |
| Trumpeter Swan | Cygnus buccinator | Occasional | Native |
| Tundra Swan | Cygnus columbianus | Occasional | Native |
| Turkey Vulture | Cathartes aura | Common | Native |
| Two-barred Crossbill, White-winged Crossbill | Loxia leucoptera | Occasional | Native |
| Varied Thrush | Ixoreus naevius | Occasional | Native |
| Vaux’s Swift | Chaetura vauxi | Occasional | Native |
| Verdin | Auriparus flaviceps | Rare | Native |
| Vermilion Flycatcher | Pyrocephalus rubinus | Occasional | Native |
| Vesper Sparrow | Pooecetes gramineus | Uncommon | Native |
| Vesper Sparrow | Pooecetes gramineus confinis | Uncommon | Native |
| Violet-green Swallow | Tachycineta thalassina | Common | Native |
| Violet-green Swallow | Tachycineta thalassina thalassina | Common | Native |
| Virginia Rail | Rallus limicola | Rare | Native |
| Virginia’s Warbler | Oreothlypis virginiae | Common | Native |
| Warbling Vireo | Vireo gilvus | Common | Native |
| Warbling Vireo | Vireo gilvus brewsteri | Common | Native |
| Warbling Vireo | Vireo gilvus swainsoni | Common | Native |
| Western Bluebird | Sialia mexicana | Common | Native |
| Western Bluebird | Sialia mexicana bairdi | Common | Native |
| Western Grebe | Aechmophorus occidentalis | Common | Native |
| Western Kingbird | Tyrannus verticalis | Uncommon | Native |
| Western Meadowlark | Sturnella neglecta | Common | Native |
| Western Sandpiper | Calidris mauri | Occasional | Native |
| Western Screech-owl | Megascops kennicottii | Common | Native |
| Western Scrub Jay, Scrub Jay | Aphelocoma californica | Common | Native |
| Western Tanager | Piranga ludoviciana | Common | Native |
| Western Wood-Pewee | Contopus sordidulus | Common | Native |
| Western Wood-Pewee | Contopus sordidulus saturatus | Common | Native |
| Western Wood-Pewee | Contopus sordidulus veliei | Common | Native |
| White Wagtail | Motacilla alba | Occasional | Unknown |
| White-breasted Nuthatch | Sitta carolinensis | Common | Native |
| White-breasted Nuthatch | Sitta carolinensis nelsoni | Common | Native |
| White-crowned Sparrow | Zonotrichia leucophrys | Common | Native |
| White-crowned Sparrow | Zonotrichia leucophrys gambelii | Common | Native |
| White-crowned Sparrow | Zonotrichia leucophrys oriantha | Common | Native |
| White-faced Ibis | Plegadis chihi | Uncommon | Native |
| White-throated Sparrow | Zonotrichia albicollis | Rare | Native |
| White-throated Swift | Aeronautes saxatalis | Common | Native |
| White-throated Swift | Aeronautes saxatalis saxatalis | Common | Native |
| White-winged Dove | Zenaida asiatica | Occasional | Native |
| White-winged Scoter, Velvet Scoter | Melanitta fusca | Occasional | Native |
| Wild Turkey | Meleagris gallopavo | Common | Native |
| Willet | Tringa semipalmata | Rare | Native |
| Williamson’s Sapsucker | Sphyrapicus thyroideus | Common | Native |
| Williamson’s Sapsucker | Sphyrapicus thyroideus nataliae | Common | Native |
| Willow Flycatcher | Empidonax traillii | Rare | Native |
| Wilson’s Phalarope | Phalaropus tricolor | Rare | Native |
| Wilson’s Snipe, Common Snipe | Gallinago delicata | Uncommon | Native |
| Wilson’s Warbler | Cardellina pusilla | Common | Native |
| Wilson’s Warbler | Cardellina pusilla chryseola | Common | Native |
| Wilson’s Warbler | Cardellina pusilla pusilla | Common | Native |
| Winter Wren | Troglodytes hiemalis | Occasional | Native |
| Wood Duck | Aix sponsa | Occasional | Native |
| Wood Stork | Mycteria americana | Occasional | Native |
| Worm-eating Warbler | Helmitheros vermivorum | Occasional | Native |
| Yellow Warbler | Setophaga aestiva morcomi | Common | Native |
| Yellow-bellied Sapsucker | Sphyrapicus varius | Occasional | Native |
| Yellow-billed Cuckoo | Coccyzus americanus | Occasional | Native |
| Yellow-breasted Chat | Icteria virens | Common | Native |
| Yellow-headed Blackbird | Xanthocephalus xanthocephalus | Uncommon | Native |
| Yellow-rumped Warbler | Setophaga auduboni auduboni | Common | Native |
| Yellow-rumped Warbler | Setophaga coronata | Common | Native |
| Yellow-throated Warbler | Setophaga dominica | Occasional | Native |
| Yuma Clapper Rail | Rallus longirostris yumanensis | Occasional | Native |
| Zone-tailed Hawk | Buteo albonotatus | Common | Native |
| Amphibians | Birds | Fish | Mammals | Reptiles | Plants |
Fish
Smallmouth Bass | Photo Credit: Public Domain Images 
Brown Trout | Photo Credit: James Hills
| Fish Name | Scientific Name | Abundance | Nativeness |
| Aurora Trout, Brook Trout, Charr, Coaster Brook Trout, Salter, Sea Trout | Salvelinus fontinalis | Rare | Non-native |
| Black Bullhead | Ameiurus melas | Rare | Non-native |
| Black Crappie | Pomoxis nigromaculatus | Unknown | Non-native |
| Bluegill | Lepomis macrochirus | Rare | Non-native |
| Bluehead Sucker | Catostomus discobolus | Common | Native |
| Brown Trout | Salmo trutta | Uncommon | Non-native |
| Channel Catfish, Graceful Catfish | Ictalurus punctatus | Uncommon | Non-native |
| Common Carp, European Carp | Cyprinus carpio | Common | Non-native |
| Fathead Minnow | Pimephales promelas | Common | Non-native |
| Flannelmouth Sucker | Catostomus latipinnis | Common | Native |
| Golden Shiner | Notemigonus crysoleucas | Rare | Non-native |
| Green Sunfish | Lepomis cyanellus | Rare | Non-native |
| Humpback Chub | Gila cypha | Uncommon | Native |
| Largemouth Bass | Micropterus salmoides | Rare | Non-native |
| Mosquitofish, Western Mosquitofish | Gambusia affinis | Uncommon | Non-native |
| Plains Killifish | Fundulus zebrinus | Uncommon | Non-native |
| Rainbow Trout, Redband Trout, Steelhead | Oncorhynchus mykiss | Unknown | Non-native |
| Red Shiner | Cyprinella lutrensis | Uncommon | Non-native |
| Rockfish, Striped Bass | Morone saxatilis | Rare | Non-native |
| Smallmouth Bass | Micropterus dolomieu | Unknown | Non-native |
| Speckled Dace | Rhinichthys osculus | Common | Native |
| Threadfin Shad | Dorosoma petenense | Rare | Non-native |
| Walleye | Sander vitreus | Rare | Non-native |
| Yellow Bullhead | Ameiurus natalis | Occasional | Non-native |
| Amphibians | Birds | Fish | Mammals | Reptiles | Plants |
Mammals
Mule Deer, Grand Canyon National Park, Arizona | Photo Credit: Michael Quinn, NPS 
A Pair of Bighorn Sheep, Grand Canyon National Park, Arizona | Photo Credit: Mark Lellouch, NPS
| Mammal Name | Scientific Name | Abundance | Nativeness |
| Abert’s Squirrel | Sciurus aberti aberti | Common | Native |
| Allen’s Lappet-browed Bat | Idionycteris phyllotis | Uncommon | Native |
| American Badger, Badger | Taxidea taxus | Uncommon | Native |
| American Beaver | Castor canadensis | Uncommon | Native |
| American Bison, American Bison, Bison | Bison bison | Abundant | Native |
| American Black Bear, Black Bear | Ursus americanus | Rare | Native |
| Arizona Pocket Mouse | Perognathus amplus | Uncommon | Native |
| Ass, Burro, Donkey, Feral Burro, Wild Ass | Equus asinus | Unknown | Non-native |
| Big Brown Bat, Big Brown Bat | Eptesicus fuscus | Common | Native |
| Big Free-tailed Bat, Big Free-tailed Bat | Nyctinomops macrotis | Common | Native |
| Black-tailed Jack Rabbit, Black-tailed Jackrabbit | Lepus californicus | Uncommon | Native |
| Bobcat | Lynx rufus | Common | Native |
| Botta’s Pocket Gopher | Thomomys bottae | Common | Native |
| Brazilian Free-tailed Bat, Brazilian Free-tailed Bat, Mexican Free-tailed Bat | Tadarida brasiliensis | Common | Native |
| Brush Deermouse, Brush Mouse | Peromyscus boylii | Common | Native |
| Bushy-tailed Woodrat | Neotoma cinerea | Common | Native |
| Cactus Deermouse, Cactus Mouse | Peromyscus eremicus | Common | Native |
| California Myotis, California Myotis, Californian Myotis | Myotis californicus | Common | Native |
| Canyon Deermouse, Canyon Mouse | Peromyscus crinitus | Common | Native |
| Chisel-toothed Kangaroo Rat | Dipodomys microps | Uncommon | Native |
| Cliff Chipmunk | Tamias dorsalis | Common | Native |
| Colorado Chipmunk | Tamias quadrivittatus | Uncommon | Native |
| Common Gray Fox, Gray Fox | Urocyon cinereoargenteus | Uncommon | Native |
| Common Muskrat, Muskbeaver, Muskrat | Ondatra zibethicus | Uncommon | Native |
| Common Otter, North American River Otter, Northern River Otter, River Otter | Lontra canadensis | Occasional | Native |
| Common Porcupine, Porcupine | Erethizon dorsatum | Common | Native |
| Common Raccoon, Northern Raccoon, Raccoon | Procyon lotor | Uncommon | Native |
| Coronation Island Vole, Long-tailed Vole | Microtus longicaudus | Common | Native |
| Cougar, Mountain Lion, Puma | Puma concolor | Uncommon | Native |
| Coyote | Canis latrans | Common | Native |
| Crawford’s Gray Shrew, Desert Shrew, Gray Shrew | Notiosorex crawfordi | Rare | Native |
| Deer Mouse, North American Deermouse | Peromyscus maniculatus | Common | Native |
| Desert Bighorn Sheep | Ovis canadensis mexicana | Uncommon | Native |
| Desert Cottontail | Sylvilagus audubonii | Common | Native |
| Desert Woodrat | Neotoma lepida | Common | Native |
| Dwarf Shrew, Rocky Mountain Dwarf Shrew | Sorex nanus | Uncommon | Native |
| Elk, Wapiti | Cervus elaphus | Abundant | Non-native |
| Fringed Myotis, Fringed Myotis | Myotis thysanodes | Common | Native |
| Golden-mantled Ground Squirrel | Spermophilus lateralis | Common | Native |
| Great Basin Pocket Mouse | Perognathus parvus | Common | Native |
| Greater Bonneted Bat, Western Bonneted Bat, Western Mastiff-bat | Eumops perotis | Uncommon | Native |
| Greater Western Bonneted Bat, Greater Western Mastiff Bat | Eumops perotis californicus | Rare | Native |
| Gunnison’s Prairie Dog | Cynomys gunnisoni | Rare | Native |
| Harris’ Antelope Squirrel, Harris’s Antelope Squirrel | Ammospermophilus harrisii | Rare | Native |
| Hoary Bat, Hoary Bat | Lasiurus cinereus | Uncommon | Native |
| House Mouse | Mus musculus | Uncommon | Native |
| Javelina | Pecari tajacu | Uncommon | Non-native |
| Kaibab Squirrel | Sciurus aberti kaibabensis | Common | Native |
| Kit Fox | Vulpes macrotis | Uncommon | Native |
| Least Chipmunk | Tamias minimus | Common | Native |
| Little Brown Bat, Little Brown Myotis, Little Brown Myotis | Myotis lucifugus | Rare | Native |
| Long-eared Myotis, Long-eared Myotis | Myotis evotis | Uncommon | Native |
| Long-legged Myotis, Long-legged Myotis | Myotis volans | Common | Native |
| Long-tailed Pocket Mouse | Chaetodipus formosus | Uncommon | Native |
| Long-tailed Weasel | Mustela frenata | Uncommon | Native |
| Long-tongued Bat, Mexican Long-tongued Bat, Mexican Long-tongued Bat | Choeronycteris mexicana | Rare | Native |
| Merriam’s Kangaroo Rat | Dipodomys merriami | Uncommon | Native |
| Merriam’s Shrew | Sorex merriami | Rare | Native |
| Mexican Woodrat | Neotoma mexicana | Common | Native |
| Mountain Cottontail, Nuttall’s Cottontail | Sylvilagus nuttallii | Uncommon | Native |
| Mule Deer, Mule Deer | Odocoileus hemionus | Abundant | Native |
| Navajo Mexican Vole | Microtus mexicanus | Uncommon | Native |
| Northern Grasshopper Mouse | Onychomys leucogaster | Uncommon | Native |
| Northern Pocket Gopher | Thomomys talpoides | Common | Native |
| Ord’s Kangaroo Rat | Dipodomys ordii | Uncommon | Native |
| Pale Townsend’s Big-eared Bat | Corynorhinus townsendii | Uncommon | Native |
| Pallid Bat, Pallid Bat | Antrozous pallidus | Common | Native |
| Piñon Deermouse, Piñon Mouse, Pinyon Mouse | Peromyscus truei | Common | Native |
| Pocketed Free-tailed Bat, Pocketed Free-tailed Bat | Nyctinomops femorosaccus | Rare | Native |
| Pronghorn, Pronghorn | Antilocapra americana | Common | Native |
| Red Bat, Western Red Bat, Western Red Bat | Lasiurus blossevillii | Rare | Native |
| Red Squirrel | Tamiasciurus hudsonicus | Uncommon | Native |
| Ringtail | Bassariscus astutus | Common | Native |
| Rock Pocket Mouse | Chaetodipus intermedius | Common | Native |
| Rock Squirrel | Spermophilus variegatus | Common | Native |
| Silky Pocket Mouse | Perognathus flavus | Uncommon | Native |
| Silver-haired Bat, Silver-haired Bat | Lasionycteris noctivagans | Rare | Native |
| Southwestern Myotis, Southwestern Myotis | Myotis auriculus | Rare | Native |
| Spotted Bat, Spotted Bat | Euderma maculatum | Uncommon | Native |
| Spotted Ground Squirrel | Spermophilus spilosoma | Rare | Native |
| Stephen’s Woodrat, Stephens’s Woodrat | Neotoma stephensi | Common | Native |
| Striped Skunk | Mephitis mephitis | Common | Native |
| Uinta Chipmunk | Tamias umbrinus | Common | Native |
| Western Harvest Mouse | Reithrodontomys megalotis | Common | Native |
| Western Hognosed Skunk | Conepatus leuconotus | Rare | Native |
| Western Pipistrelle | Pipistrellus hesperus | Common | Native |
| Western Spotted Skunk | Spilogale gracilis | Uncommon | Native |
| White-nosed Coati | Nasua narica | Rare | Native |
| White-tailed Antelope Squirrel | Ammospermophilus leucurus | Common | Native |
| White-throated Woodrat | Neotoma albigula | Common | Native |
| Yuma myotis, Yuma Myotis | Myotis yumanensis | Common | Native |
| Amphibians | Birds | Fish | Mammals | Reptiles | Plants |
Reptiles
Desert Horned Lizard Profile | Photo Credit: Skeeze 
Prairie Rattlesnake | Photo Credit: Skeeze
| Reptile Name | Scientific Name | Abundance | Nativeness |
| [Common Name Unknown] | Eumeces multivirgatus epipleurotus | Unknown | Unknown |
| Agassiz’s Desert Tortoise, Desert Tortoise, Mohave Desert Tortoise, Mojave Desert Tortoise | Gopherus agassizii | Rare | Native |
| Black-tailed Rattlesnake | Crotalus molossus | Uncommon | Native |
| Bullsnake, Gopher Snake | Pituophis catenifer | Common | Native |
| California Kingsnake | Lampropeltis getula californiae | Unknown | Native |
| Coachwhip | Masticophis flagellum | Uncommon | Native |
| Collared Lizard, Eastern Collared Lizard | Crotaphytus collaris | Common | Native |
| Common Chuckwalla, Northern Chuckwalla | Sauromalus ater | Unknown | Unknown |
| Common Kingsnake | Lampropeltis getula | Uncommon | Native |
| Common Side-blotched Lizard, Side-blotched Lizard | Uta stansburiana | Abundant | Native |
| Desert Collared Lizard, Great Basin Collared Lizard, Mojave Black-collared Lizard | Crotaphytus bicinctores | Common | Native |
| Desert Horned Lizard | Phrynosoma platyrhinos | Uncommon | Native |
| Desert Night Lizard | Xantusia vigilis | Rare | Native |
| Desert Spiny Lizard | Sceloporus magister | Abundant | Native |
| Desert Striped Whipsnake | Masticophis taeniatus taeniatus | Common | Native |
| Eastern Fence Lizard, Fence Lizard, Plateau Lizard, Prairie Lizard | Sceloporus undulatus | Abundant | Native |
| Gila Monster | Heloderma suspectum | Rare | Native |
| Grand Canyon Rattlesnake, Pink Rattlesnake | Crotalus oreganus abyssus | Rare | Native |
| Great Basin Gopher Snake | Pituophis catenifer deserticola | Common | Native |
| Great Basin Rattlesnake | Crotalus oreganus lutosus | Unknown | Native |
| Greater Short-horned Lizard, Hernandez’s Short-horned Lizard, Mountain Short-horned Lizard | Phrynosoma hernandesi | Common | Native |
| Ground Snake, Groundsnake | Sonora semiannulata | Rare | Native |
| Hopi Rattlesnake | Crotalus viridis nuntius | Unknown | Native |
| Little Striped Whiptail | Cnemidophorus inornatus | Rare | Native |
| Long-nosed Snake | Rhinocheilus lecontei | Uncommon | Native |
| Many-lined Skink | Eumeces multivirgatus | Rare | Native |
| Mojave Patch-nosed Snake | Salvadora hexalepis mojavensis | Uncommon | Native |
| Night Snake, Nightsnake | Hypsiglena torquata | Rare | Native |
| Northern Cliff Lizard, Northern Tree Lizard | Urosaurus ornatus wrighti | Unknown | Unknown |
| Northern Plateau Lizard | Sceloporus undulatus elongatus | Unknown | Unknown |
| Northern Sagebrush Lizard | Sceloporus graciosus graciosus | Unknown | Unknown |
| Northern Whiptail | Cnemidophorus tigris septentrionalis | Unknown | Unknown |
| Ornate Tree Lizard, Tree Lizard | Urosaurus ornatus | Abundant | Native |
| Plateau Striped Whiptail | Cnemidophorus velox | Common | Native |
| Prairie Rattlesnake, Western Rattlesnake | Crotalus viridis | Common | Native |
| Red Coachwhip, Racer | Masticophis flagellum piceus | Uncommon | Native |
| Ringneck Snake, Ring-necked Snake | Diadophis punctatus | Occasional | Native |
| Sagebrush Lizard | Sceloporus graciosus | Abundant | Native |
| Sonoran Gopher Snake | Pituophis catenifer affinis | Common | Native |
| Sonoran Mountain Kingsnake | Lampropeltis pyromelana | Uncommon | Native |
| Southern Plateau Lizard | Sceloporus undulatus tristichus | Unknown | Unknown |
| Southwestern Black-headed Snake, Smith’s Black-headed Snake | Tantilla hobartsmithi | Rare | Native |
| Speckled Rattlesnake | Crotalus mitchellii | Common | Native |
| Spiny Lizards | Sceloporus | Unknown | Unknown |
| Striped Whipsnake | Masticophis taeniatus | Common | Native |
| Utah Mountain Kingsnake | Lampropeltis pyromelana infralabialis | Unknown | Unknown |
| Wandering Garter Snake | Thamnophis elegans vagrans | Uncommon | Native |
| Western Banded Gecko | Coleonyx variegatus | Uncommon | Native |
| Western Long-nosed Snake | Rhinocheilus lecontei lecontei | Rare | Native |
| Western Lyre Snake, Sonoran Lyre Snake | Trimorphodon biscutatus | Rare | Native |
| Western Patch-nosed Snake | Salvadora hexalepis | Uncommon | Native |
| Western Skink | Eumeces skiltonianus | Common | Native |
| Western Slender Blind Snake, Western Threadsnake | Leptotyphlops humilis | Rare | Native |
| Western Terrestrial Garter Snake | Thamnophis elegans | Uncommon | Native |
| Western Whiptail | Cnemidophorus tigris | Abundant | Native |
| Yellow-backed Spiny Lizard | Sceloporus magister uniformis | Common | Native |
| Zebra-tailed Lizard | Callisaurus draconoides | Uncommon | Native |
| Amphibians | Birds | Fish | Mammals | Reptiles | Plants |
Plants
Sweet Fennel | Photo Credit: Hans Braxmeier 
Common Reed | Photo Credit: Miroslav Sárkozy
| Plant Name | Scientific Name | Abundance | Nativeness |
| [Common Name Unknown] | Aquilegia chrysantha X desertorum | Native | |
| [Common Name Unknown] | Artemisia ludoviciana var. albula | Native | |
| [Common Name Unknown] | Chenopodium berlandieri var. zschackii | Native | |
| [Common Name Unknown] | Cystopteris fragilis X cf. tennessensis | Native | |
| [Common Name Unknown] | Diplachne uninervia | Native | |
| [Common Name Unknown] | Echinocereus triglochidiatus X engelmannii | Native | |
| [Common Name Unknown] | Encelia resinifera ssp. tenuifolia | Native | |
| [Common Name Unknown] | Ericameria nauseosa ssp. consimilis var. juncea | Native | |
| [Common Name Unknown] | Ericameria nauseosa ssp. consimilis var. leiosperma | Native | |
| [Common Name Unknown] | Ericameria nauseosa ssp. nauseosa var. hololeuca | Native | |
| [Common Name Unknown] | Mentha X spicata | Occasional | Non-native |
| [Common Name Unknown] | Myosurus minimus | Native | |
| [Common Name Unknown] | Nolina microcarpa | Native | |
| [Common Name Unknown] | Oenothera caespitosa var. navajoensis | Native | |
| [Common Name Unknown] | Pennisetum glaucum | Non-native | |
| [Common Name Unknown] | Plantago argyraea | Native | |
| [Common Name Unknown] | Salvia dorrii ssp. dorrii var. dorrii | Native | |
| [Common Name Unknown] | Sambucus glauca | Native | |
| [Common Name Unknown] | Stuckenia pectinatus | Native | |
| [Common Name Unknown] | Yucca baccata X aff. elata | Native | |
| abata cryptantha, dent-nut catseye, dentnut cryptantha | Cryptantha abata | Native | |
| Achnatherum, Bloomer ricegrass, Bloomer’s ricegrass | Achnatherum X bloomeri | Native | |
| Adonis blazingstar, Adonis stickleaf, desert blazingstar, manyflowered mentzelia | Mentzelia multiflora | Native | |
| African addersmouth, African malcolmia, African mustard | Malcolmia africana | Non-native | |
| African mustard, Asian mustard, Tournefort’s birdrape, wild turnip | Brassica tournefortii | Non-native | |
| African sage, Mediterranean sage | Salvia aethiopis | Non-native | |
| akulikuli-kula, common purslane, duckweed, garden purslane, little hogweed, little-hogweed, purslane, pursley, wild portulaca | Portulaca oleracea | Native | |
| Aladdin’s slippers, evening milkvetch | Astragalus amphioxys var. vespertinus | Native | |
| albaricoque, apricot, damasco, Siberian apricot | Prunus armeniaca | Non-native | |
| Albert’s creeping zinnia | Sanvitalia abertii | Native | |
| alderleaf cercocarpus, alderleaf mountain-mahogany, birchleaf mountain-mahogany, mountain-mahogany, true mountain-mahogany | Cercocarpus montanus | Native | |
| aleppo milletgrass, herbe de Cuba, Johnson grass, Johnsongrass, sorgho d’Alep, sorgo de alepo, zacate Johnson | Sorghum halepense | Non-native | |
| alfalfa | Medicago sativa | Non-native | |
| alfilaree, alfilaria, California filaree, cutleaf filaree, filaree, redstem filaree, redstem stork’s bill, stork’s bill | Erodium cicutarium | Non-native | |
| alkali buttercup, shore buttercup | Ranunculus cymbalaria | Native | |
| alkali goldenbush, alkali goldenweed | Isocoma acradenia var. acradenia | Native | |
| alkali goldenbush, alkali jimmyweed | Isocoma acradenia | Native | |
| alkali mallow | Malvella leprosa | Native | |
| alkali muhly, scratchgrass | Muhlenbergia asperifolia | Native | |
| alkali sacaton, alkali-sacaton | Sporobolus airoides | Native | |
| alkali seepweed, Mojave seablite, shrubby seepweed, Torrey’s seepweed | Suaeda moquinii | Native | |
| alpine bitterroot, alpine lewisia, pigmy bitterroot | Lewisia pygmaea | Native | |
| alpine false springparsley, anise, false springparsley | Pseudocymopterus montanus | Native | |
| alpine golden buckwheat, yellow eriogonum | Eriogonum flavum | Native | |
| alpine pearlwort, arctic pearlwort | Sagina saginoides | Native | |
| alpine pennycress, Fendler pennycress, Fendler’s pennycress | Thlaspi montanum var. fendleri | Native | |
| alpine prickly currant, gooseberry currant, mountain gooseberry | Ribes montigenum | Native | |
| alpine spikemoss, Watson’s spikemoss | Selaginella watsonii | Native | |
| alpine timothy | Phleum alpinum | Native | |
| alsike clover | Trifolium hybridum | Non-native | |
| alyssum, European alyssum | Alyssum minus | Non-native | |
| amberlily, Torrey’s craglily | Echeandia flavescens | Native | |
| American bistort | Polygonum bistortoides | Native | |
| American black elderberry, blue elder, common elderberry, elder, elderberry, Mexican elderberry | Sambucus nigra ssp. canadensis | Native | |
| American black nightshade | Solanum americanum | Native | |
| American bulrush, chairmaker’s bulrush, Olney bulrush, Schoenoplectus | Schoenoplectus americanus | Native | |
| American deervetch, American purple vetch, American vetch | Vicia americana | Native | |
| American dragonhead | Dracocephalum parviflorum | Native | |
| American licorice, licorice, wild licorice | Glycyrrhiza lepidota | Native | |
| American sloughgrass, slough grass | Beckmannia syzigachne | Native | |
| American speedwell, brooklime | Veronica americana | Native | |
| American spikenard | Aralia racemosa | Native | |
| American threefold, American trixis, California trixis | Trixis californica | Native | |
| American wild carrot, rattlesnake carrot, rattlesnake weed, southwest wild carrot | Daucus pusillus | Native | |
| Anderson wolfberry, Anderson’s wolfberry, water jacket | Lycium andersonii | Native | |
| annual agoseris, annual goatsbeard, mountain dandelion | Agoseris heterophylla | Native | |
| annual blue grass, annual bluegrass, walkgrass | Poa annua | Non-native | |
| annual bursage, bursage, bursage ragweed, flatspine bur ragweed, flatspine burr ragweed, flat-spine burr-ragweed, sand bursage | Ambrosia acanthicarpa | Native | |
| annual cudweed, cotton cudweed, cottonbatting cudweed, cottonbatting plant | Pseudognaphalium stramineum | Native | |
| annual gentian, autumn dwarf gentian, autumn dwarfgentian, autumn dwarf-gentian | Gentianella amarella | Native | |
| annual goldeneye, longleaf false goldeneye, longleaf falsegoldeneye | Heliomeris longifolia var. annua | Native | |
| annual muhly | Muhlenbergia minutissima | Native | |
| annual muhly, delicate muhly | Muhlenbergia fragilis | Native | |
| annual psathyrotes, mealy rosettes, turtleback | Psathyrotes annua | Native | |
| annual rabbitsfoot grass, annual rabbit’s-foot grass, rabbitfoot beardgrass, rabbitfoot grass, rabbitfoot polypogon, rabbitfootgrass, rabbit’sfootgrass | Polypogon monspeliensis | Non-native | |
| annual ragweed, common ragweed, low ragweed, ragweed, Roman wormwood, short ragweed, small ragweed | Ambrosia artemisiifolia | Native | |
| annual ryegrass, Italian ryegrass, perennial rye grass | Lolium perenne ssp. multiflorum | Non-native | |
| annual sowthistle, common sowthistle, common sow-thistle, pualele, sow thistle, sow-thistle | Sonchus oleraceus | Non-native | |
| annual sunflower, common sunflower, sunflower, wild sunflower | Helianthus annuus | Native | |
| annual witchgrass, common panic grass, common witchgrass, panicgrass, ticklegrass, tumble panic, tumbleweed grass, witches hair, witchgrass | Panicum capillare | Native | |
| annual yellow sweetclover, Indian sweet-clover | Melilotus indicus | Non-native | |
| antelope bitterbrush | Purshia tridentata | Native | |
| antelope horns, antelopehorn milkweed, spider antelope-horns, spider milkweed | Asclepias asperula | Native | |
| antelope horns, antelopehorns | Asclepias asperula ssp. capricornu | Native | |
| Apache plume | Fallugia paradoxa | Native | |
| Arabian schismus | Schismus arabicus | Non-native | |
| arctic goldenrod, manyray goldenrod, mountain goldenrod, Rocky Mountain goldenrod | Solidago multiradiata | Native | |
| Argus blazingstar | Mentzelia oreophila | Native | |
| arid goosefoot, aridland goosefoot, desert goosefoot, narrowleaf goosefoot | Chenopodium desiccatum | Native | |
| arid needlegrass, Mormon needlegrass | Achnatherum aridum | Native | |
| Aristida ternipes var. gentili, mesa threeawn, spidergrass, threeawn | Aristida ternipes var. gentilis | Native | |
| Arizona acacia, catclaw, catclaw acacia, catclaw mimosa | Acacia greggii var. greggii | Native | |
| Arizona alumroot, little-leaf alumroot | Heuchera parvifolia var. arizonica | Native | |
| Arizona beardtongue, coiled anther penstemon | Penstemon ophianthus | Native | |
| Arizona black walnut, Arizona walnut, New Mexico walnut | Juglans major | Native | |
| Arizona bladderpod | Lesquerella arizonica | Native | |
| Arizona brome | Bromus arizonicus | Native | |
| Arizona centaury | Centaurium calycosum | Native | |
| Arizona cinquefoil | Potentilla glandulosa ssp. arizonica | Native | |
| Arizona clematis | Clematis hirsutissima var. arizonica | Native | |
| Arizona coraldrops | Besseya arizonica | Native | |
| Arizona cottontop | Digitaria californica | Native | |
| Arizona desert-thorn, littleleaf wolfberry | Lycium exsertum | Native | |
| Arizona dudleya, chalk dudleya, rock echeveria | Dudleya pulverulenta ssp. arizonica | Native | |
| Arizona ephedra, Arizona jointfir, desert Mormon tea | Ephedra fasciculata | Native | |
| Arizona fiestaflower, blue fiesta-flower | Pholistoma auritum var. arizonicum | Native | |
| Arizona four-nerve daisy, stemless four-nerve daisy | Tetraneuris acaulis var. arizonica | Native | |
| Arizona honeysuckle | Lonicera arizonica | Native | |
| Arizona honeysweet, honeysweet tidestromia | Tidestromia oblongifolia | Native | |
| Arizona ipomopsis, Arizona skyrocket | Ipomopsis arizonica | Native | |
| Arizona jewelflower, Arizona twistflower, lyreleaf jewelflower | Streptanthus carinatus ssp. arizonicus | Native | |
| Arizona lupine | Lupinus arizonicus | Native | |
| Arizona lupine | Lupinus arizonicus ssp. arizonicus | Native | |
| Arizona mountain dandelion, false agoseris | Agoseris glauca var. laciniata | Native | |
| Arizona mountain-ash | Sorbus dumosa | Native | |
| Arizona mousetail | Myosurus cupulatus | Native | |
| Arizona mule-ears, Arizona mulesears | Wyethia arizonica | Native | |
| Arizona peavine, aspen peavine, Nevada pea | Lathyrus lanszwertii var. leucanthus | Native | |
| Arizona pincushion cactus, Arizona spinystar | Escobaria vivipara var. arizonica | Native | |
| Arizona popcornflower, bloodweed, lipstick plant | Plagiobothrys arizonicus | Native | |
| Arizona prickly poppy, Arizona pricklypoppy | Argemone arizonica | Native | |
| Arizona rubberweed | Hymenoxys subintegra | Native | |
| Arizona sandmat | Chamaesyce arizonica | Native | |
| Arizona springparsley, purplenerve springparsley, wild parsnip | Cymopterus multinervatus | Native | |
| Arizona sycamore | Platanus wrightii | Non-native | |
| Arizona thistle | Cirsium arizonicum | Native | |
| Arizona thistle | Cirsium arizonicum var. nidulum | Native | |
| Arizona threeawn | Aristida arizonica | Native | |
| Arizona whitefeather | Ivesia arizonica var. arizonica | Native | |
| arrowleaf, bush arrowleaf | Pleurocoronis pluriseta | Native | |
| arrowweed | Pluchea sericea | Native | |
| arroyo willow | Salix lasiolepis | Native | |
| ashen milkvetch | Astragalus tephrodes | Native | |
| ashy silktassel, yellowleaf silktassel | Garrya flavescens | Native | |
| aspen daisy, aspen fleabane | Erigeron speciosus var. macranthus | Native | |
| aspen daisy, aspen fleabane | Erigeron speciosus var. speciosus | Native | |
| aspen onion | Allium bisceptrum var. palmeri | Native | |
| aspen onion, twincrest onion | Allium bisceptrum | Native | |
| aspen pea, aspen peavine, aspen vetchling, plateau peavine | Lathyrus laetivirens | Native | |
| Athel tamarisk, saltcedar, tamarisk, tamarix | Tamarix aphylla | Non-native | |
| Atwood’s catseye, Atwood’s cryptantha | Cryptantha atwoodii | Native | |
| autumn dwarf gentian, autumn dwarfgentian, autumn dwarf-gentian | Gentianella amarella ssp. acuta | Native | |
| autumn dwarf gentian, dwarf gentian | Gentianella amarella ssp. heterosepala | Native | |
| autumn willowherb, autumn willowweed, tall annual willowherb | Epilobium brachycarpum | Native | |
| awlleaf mudwort, awl-leaf mudwort, northern mudwort, water mudwort | Limosella aquatica | Native | |
| awnless brome, smooth brome | Bromus inermis | Non-native | |
| baby goldenrod, gray goldenrod | Solidago nana | Native | |
| balsam fir, Rocky Mountain fir, subalpine fir, western balsam fir, white balsam | Abies lasiocarpa | Native | |
| Baltic rush | Juncus balticus | Native | |
| banana yucca, datil yucca | Yucca baccata | Native | |
| barestem larkspur, tall mountain larkspur | Delphinium scaposum | Native | |
| barnyard grass, barnyardgrass, cockspur, Japanese millet, large barnyard grass, watergrass | Echinochloa crus-galli | Non-native | |
| barren bromegrass, poverty brome, sterile brome | Bromus sterilis | Non-native | |
| basin bladderpod | Lesquerella cinerea | Native | |
| basin yellow catseye, basin yellow cryptantha, roundleaf cryptantha | Cryptantha confertiflora | Native | |
| bastard toadflax, common toadflax, pale bastard toadflax, pine bastard toadflax | Comandra umbellata ssp. pallida | Native | |
| bastardsage, shrubby buckwheat, Wright’s buckwheat | Eriogonum wrightii | Native | |
| beaded lip fern, beaded lipfern, Wooton’s lipfern | Cheilanthes wootonii | Native | |
| beaked beardtongue, beakflower penstemon, Bridges’ penstemon | Penstemon rostriflorus | Native | |
| beaked spikerush, beaked spike-rush, beaked spikesedge | Eleocharis rostellata | Native | |
| beanpodded mustard, blue mustard, bluemustard, common blue mustard, crossflower, purple mustard, tenella mustard | Chorispora tenella | Non-native | |
| bear daisy, Bear River fleabane | Erigeron ursinus | Native | |
| bearded catseye, bearded cryptantha | Cryptantha barbigera | Native | |
| bearded sprangletop | Leptochloa fusca ssp. fascicularis | Native | |
| bearded wheatgrass, slender wheatgrass, slender wild rye | Elymus trachycaulus ssp. subsecundus | Native | |
| beardless lyme grass, beardless wildrye, creeping wildrye | Leymus triticoides | Native | |
| beardless rabbitsfoot grass, beardless rabbit’sfootgrass, water bentgrass | Polypogon viridis | Non-native | |
| beardlip penstemon | Penstemon barbatus | Native | |
| beautiful aster | Eurybia pulchra | Native | |
| beautiful cinquefoil, soft cinquefoil, whiteleaf cinquefoil | Potentilla pulcherrima | Native | |
| beautiful fleabane | Erigeron formosissimus | Native | |
| beautiful phacelia, beautiful scorpionweed | Phacelia pulchella | Native | |
| beautiful rockcress, beauty rockcress | Arabis pulchra | Native | |
| beautiful rockcress, desert rockcress, pale rockcress | Arabis pulchra var. pallens | Native | |
| beavertail pricklypear | Opuntia basilaris | Native | |
| beavertail pricklypear | Opuntia basilaris var. basilaris | Native | |
| beavertail pricklypear, Grand Canyon beavertail cactus | Opuntia basilaris var. longiareolata | Native | |
| bebbia, sweetbush | Bebbia juncea var. aspera | Native | |
| Bebb’s willow, gray willow | Salix bebbiana | Native | |
| bedstraw, catchweed bedstraw, cleavers, cleaverwort, goose grass, scarthgrass, stickywilly, sticky-willy, white hedge | Galium aparine | Non-native | |
| bee spiderflower, Rocky Mountain beeplant | Cleome serrulata | Native | |
| beechleaf buckthorn, beechleaf frangula | Frangula betulifolia | Native | |
| beechleaf frangula, birchleaf buckthorn | Frangula betulifolia ssp. betulifolia | Native | |
| beetle spurge, Mexican poinsettia | Euphorbia eriantha | Native | |
| Bermudagrass, chiendent pied-de-poule, common bermudagrass, devilgrass, grama-seda, manienie, motie molulu | Cynodon dactylon | Non-native | |
| berryleaf globemallow, gooseberryleaf globemallow | Sphaeralcea grossulariifolia ssp. pedata | Native | |
| betatakin fiddleleaf | Nama retrorsum | Native | |
| biannual lettuce, Louisiana lettuce, wild lettuce | Lactuca ludoviciana | Native | |
| biennial cinquefoil | Potentilla biennis | Native | |
| big bluestem, bluejoint, turkeyfoot | Andropogon gerardii | Native | |
| big galleta | Pleuraphis rigida | Native | |
| big sagebrush, big sagebush | Artemisia tridentata | Native | |
| big squirreltail, big wild rye | Elymus multisetus | Native | |
| big taper, common mullein, flannel mullein, flannel plant, great mullein, mullein, velvet dock, velvet plant, woolly mullein | Verbascum thapsus | Non-native | |
| bigbract verbena, bracted vervain, carpet vervain, prostrate verbena, prostrate vervain | Verbena bracteata | Native | |
| Bigelow bluegrass, Bigelow’s bluegrass | Poa bigelovii | Native | |
| Bigelow onion, Bigelow’s onion | Allium bigelovii | Native | |
| Bigelow sage, Bigelow sagebrush, Bigelow’s sagebrush | Artemisia bigelovii | Native | |
| Bigelow tansyaster, Bigelow’s tansyaster | Machaeranthera bigelovii var. bigelovii | Native | |
| Bigelow tansyaster, Bigelow’s tansyaster | Machaeranthera bigelovii var. mucronata | Native | |
| Bigelow’s crossosoma, ragged rockflower | Crossosoma bigelovii | Native | |
| Bigelow’s deserttrumpets, Bigelow’s linanthus | Linanthus bigelovii | Native | |
| Bigelow’s four-o’clock, wishbone-bush | Mirabilis bigelovii | Native | |
| Bigelow’s machaeranthera, Bigelow’s tansyaster, Bigelow’s tansy-aster | Machaeranthera bigelovii | Native | |
| Bigelow’s monkeyflower, yellow-throat monkey-flower | Mimulus bigelovii | Native | |
| bigflower groundsmoke, spreading groundsmoke | Gayophytum diffusum | Native | |
| bighead dustymaiden, bighead pincushion, large-flower pincushion | Chaenactis macrantha | Native | |
| bigleaf sumpweed, Jesuit’s bark | Iva frutescens | Non-native | |
| bigtooth maple, Uvalde bigtooth maple | Acer grandidentatum var. grandidentatum | Native | |
| Bill Williams Mountain giant hyssop | Agastache pallidiflora | Native | |
| bindweed heliotrope, phlox heliotrope, wide-flower heliotrope | Heliotropium convolvulaceum | Native | |
| birdcage evening primrose, birdcage eveningprimrose, birdcage evening-primrose, dune primrose | Oenothera deltoides | Native | |
| birdfoot deervetch, birdsfoot trefoil, bird’s-foot trefoil, bloomfell, cat’s clover, crowtoes, garden birdsfoot trefoil, garden bird’s-foot-trefoil, ground honeysuckle | Lotus corniculatus | Non-native | |
| Bisbee cactus, scarlet hedgehog cactus | Echinocereus coccineus var. coccineus | Native | |
| bishop’s milkvetch | Astragalus episcopus | Native | |
| bitter cherry, bittercherry | Prunus emarginata | Native | |
| bitter dock, bluntleaf dock | Rumex obtusifolius | Non-native | |
| bitter root, bitterroot, Oregon bitter-root | Lewisia rediviva | Native | |
| bitterroot, flytrap dogbane, spreading dogbane | Apocynum androsaemifolium | Native | |
| black bindweed, black-bindweed, climbing buckwheat, climbing knotweed, cornbind, dullseed cornbind, pink smartweed, wild buckwheat | Polygonum convolvulus | Non-native | |
| black chokecherry, choke cherry | Prunus virginiana var. melanocarpa | Native | |
| black elderberry, red elderberry, Rocky Mountain elder | Sambucus racemosa var. melanocarpa | Native | |
| black grama | Bouteloua eriopoda | Native | |
| Black Hills ponderosa pine, interior pondersosa pine, ponderosa pine, Rocky Mountain ponderosa pine | Pinus ponderosa var. scopulorum | Native | |
| black medic, black medic clover, black medick, hop clover, hop medic, nonesuch, yellow trefoil | Medicago lupulina | Non-native | |
| black nightshade, deadly nightshade, garden nightshade | Solanum nigrum | Non-native | |
| black sagebrush | Artemisia nova | Native | |
| blackbrush | Coleogyne ramosissima | Native | |
| blackjack pine, bull pine, ponderosa pine, rock pine, western yellow pine | Pinus ponderosa | Native | |
| blackseed spurge, black-seed spurge | Euphorbia bilobata | Native | |
| bladder senna, bladdersenna | Colutea arborescens | Rare | Non-native |
| bladdersage, Mexican bladdersage | Salazaria mexicana | Native | |
| blanketflower, red dome blanketflower, red-dome blanketflower, slender gaillardia, yellow blanketflower | Gaillardia pinnatifida | Native | |
| blite goosefoot, strawberry-blite | Chenopodium capitatum | Native | |
| blooming sally, fireweed, French-willow, great willowherb, rosebay willowherb, willowherb | Epilobium angustifolium | Native | |
| blowball, common dandelion, dandelion, faceclock | Taraxacum officinale | Non-native | |
| blue Douglas-fir, Colorado Douglas-fir, Douglas-fir, inland Douglas-fir, Rocky Mountain Douglas-fir | Pseudotsuga menziesii var. glauca | Native | |
| blue fiestaflower, blue fiesta-flower, desert fiestaflower | Pholistoma auritum | Native | |
| blue flax, Lewis’ blue flax, Lewis’ flax, prairie flax | Linum lewisii | Native | |
| blue grama | Bouteloua gracilis | Native | |
| blue monardella, gray monardella, pale monardella | Monardella glauca | Native | |
| blue sage, lambsleaf sage, lanceleaf sage, lance-leaf sage, Rocky Mountain sage, sage mint | Salvia reflexa | Native | |
| blue sailors, chickory, chicory, coffeeweed, common chicory, French endive, succory | Cichorium intybus | Non-native | |
| blue spruce, Colorado blue spruce, silver spruce | Picea pungens | Native | |
| blue threeawn | Aristida purpurea var. nealleyi | Native | |
| blue water speedwell, water speedwell | Veronica anagallis-aquatica | Non-native | |
| blue wild rye, blue wildrye | Elymus glaucus | Native | |
| bluebonnet lupine, Palmer’s lupine | Lupinus palmeri | Native | |
| bluedicks | Dichelostemma capitatum ssp. pauciflorum | Native | |
| blue-eyed Mary, littleflower collinsia, maiden blue eyed Mary, smallflower blue eyed Mary, small-flower blue-eyed Mary | Collinsia parviflora | Native | |
| blueleaf strawberry, Virginia strawberry | Fragaria virginiana ssp. glauca | Native | |
| blueweed, blueweed sunflower, Texas blueweed, Texas-blueweed, yerba parda | Helianthus ciliaris | Native | |
| blunt tansy mustard, blunt tansymustard | Descurainia obtusa | Native | |
| blunt tansy mustard, blunt tansymustard | Descurainia obtusa ssp. obtusa | Native | |
| blunt-fruit sweet-cicely, bluntseed sweetroot | Osmorhiza depauperata | Native | |
| bluntleaf spikemoss | Selaginella mutica | Native | |
| bluntleaf yellowcress, blunt-leaf yellowcress | Rorippa curvipes | Native | |
| bluntleaf yellowcress, blunt-leaf yellowcress | Rorippa curvipes var. curvipes | Native | |
| bog marshcress, bog yellowcress, common yellowcress, marsh yellowcress, marshcress, yellow watercress | Rorippa palustris | Native | |
| Bolander sedge, Bolander’s sedge, wood sedge | Carex bolanderi | Native | |
| Bonneville pea, Bonneville peavine, Bonneville vetchling, Rydberg’s peavine | Lathyrus brachycalyx | Native | |
| Bonpland’s willow, red willow | Salix bonplandiana | Native | |
| Booth’s suncup | Camissonia boothii ssp. boothii | Native | |
| bottle grass, green bristle grass, green bristlegrass, green foxtail, pigeongrass, wild millet | Setaria viridis | Non-native | |
| bottlebrush sedge, porcupine sedge | Carex hystericina | Native | |
| bottlebrush squirreltail, squirreltail | Elymus elymoides ssp. elymoides | Native | |
| bottlebrush squirreltail, squirreltail, western bottle-brush grass | Elymus elymoides | Native | |
| box elder, California boxelder | Acer negundo var. californicum | Native | |
| boxleaf, boxleaf myrtle, mountain lover, Oregon boxleaf | Paxistima myrsinites | Native | |
| bracken, bracken fern, brackenfern, northern bracken fern, western brackenfern | Pteridium aquilinum | Native | |
| bractless blazingstar, goodmother, stickleaf mentzelia | Mentzelia nuda | Native | |
| branched noseburn, branched tragia, catnip noseburn, noseburn | Tragia ramosa | Native | |
| Brandegee’s twinbugs, desert twinbugs | Dicoria canescens ssp. brandegeei | Native | |
| Brenda’s yellow catseye, Brenda’s yellow cryptantha, plateau yellow catseye | Cryptantha flava | Native | |
| brightblue speedwell, thyme-leaf speedwell | Veronica serpyllifolia ssp. humifusa | Native | |
| brightwhite, feeble prenanthella | Prenanthella exigua | Native | |
| bristlecup sandmat | Chamaesyce chaetocalyx var. chaetocalyx | Native | |
| bristlegrass, Plains bristlegrass, streambed bristlegrass, yellow bristlegrass, yellow foxtail | Setaria leucopila | Native | |
| bristlelobe cryptantha, narrowleaf pick-me-not, Panamint catseye, Panamint cryptantha | Cryptantha angustifolia | Native | |
| bristly catseye, bristly cryptantha | Cryptantha setosissima | Native | |
| bristly fiddleneck, western fiddleneck | Amsinckia tessellata | Native | |
| bristly foxtail, bur bristlegrass, hooked bristlegrass, rough bristle grass | Setaria verticillata | Non-native | |
| bristly mousetail, tiny mousetail | Myosurus apetalus var. montanus | Native | |
| brittle bladder fern, brittle bladderfern, fragile fern | Cystopteris fragilis | Native | |
| brittle cactus, brittle pricklypear, fragile cactus, jumping cactus, little pricklypear | Opuntia fragilis | Native | |
| brittle spineflower, sagebrush chorizanthe | Chorizanthe brevicornu | Native | |
| brittlebush, goldenhills, white brittlebush | Encelia farinosa | Native | |
| broad waterweed, Canada waterweed, Canadian waterweed | Elodea canadensis | Native | |
| broadfruit combseed, broadnut combseed | Pectocarya platycarpa | Native | |
| broadleaf cattail, cattail, common cattail | Typha latifolia | Native | |
| broadleaf gilia, broad-leaf gily-flower | Gilia latifolia | Native | |
| broadleaf milkweed, corn-kernel milkweed | Asclepias latifolia | Native | |
| broadleaf pepperweed, broadleaved peppergrass, broadleaved pepperweed, peppergrass mustard, perennial peppercress, perennial pepperweed, tall whitetop, Virginia pepperweed | Lepidium latifolium | Non-native | |
| broadleaf plantain, buckhorn plantain, common plantain, great plantain, rippleseed plantain | Plantago major | Non-native | |
| broadleaf pondweed, floating pondweed, floatingleaf pondweed | Potamogeton natans | Native | |
| bromegrass, cheat, chess, chess brome, rye brome, ryebrome | Bromus secalinus | Non-native | |
| broom baccharis, desert broom, desertbroom | Baccharis sarothroides | Native | |
| broom groundsel, broomlike ragwort, broom-like ragwort | Senecio spartioides | Native | |
| broom milkwort | Polygala scoparioides | Native | |
| broom sedge, pointed broom sedge | Carex scoparia | Native | |
| broom snakeweed, broomweed, perennial snakeweed, stinkweed, turpentine weed, yellow top | Gutierrezia sarothrae | Native | |
| broom-like ragwort, many-head ragwort, ragwort groundsel | Senecio spartioides var. multicapitatus | Native | |
| brown sedge | Carex subfusca | Native | |
| brownfoot, pink perezzia, Wright’s desertpeony | Acourtia wrightii | Common | Native |
| brownplume wirelettuce, fewflower wirelettuce, skeletonweed, wire lettuce, wire-lettuce | Stephanomeria pauciflora | Native | |
| brownspine pricklypear, tulip pricklypear | Opuntia phaeacantha | Native | |
| brushy cryptantha, bushy cryptantha, forget-me-not cryptantha | Cryptantha racemosa | Native | |
| buckhorn cholla | Opuntia acanthocarpa | Native | |
| buckhorn plantain, English plantain, lanceleaf Indianwheat, lanceleaf plantain, narrowleaf plantain, ribgrass, ribwort | Plantago lanceolata | Non-native | |
| buffalo gourd, buffalogourd pumpkin, calabazilla, Missouri gourd, wild gourd, wild pumkin | Cucurbita foetidissima | Native | |
| buffalobur, buffalobur nightshade, Colorado bur, horned nightshade, Kansas thistle, Mexican thistle, Texas thistle | Solanum rostratum | Native | |
| bulbous barley, mouse barley | Hordeum murinum | Non-native | |
| bulbous blue grass, bulbous bluegrass | Poa bulbosa | Occasional | Non-native |
| bull filaree, Texas filaree, Texas fillarie, Texas stork’s bill, tufted filaree | Erodium texanum | Native | |
| bull thistle, common thistle, spear thistle | Cirsium vulgare | Non-native | |
| bullhead, caltrop, goathead, Mexican sandbur, puncture vine, Texas sandbur | Tribulus terrestris | Non-native | |
| bunchberry elder, red elderberry | Sambucus racemosa var. racemosa | Native | |
| bur buttercup, curveseed butterwort, curve-seed-butterwort | Ceratocephala testiculata | Non-native | |
| bur clover, bur medick, burclover, California burclover, toothed medick | Medicago polymorpha | Occasional | Non-native |
| bur marigold, devil’s beggartick, devil’s beggarticks, devil’s bootjack, devil’s-pitchfork, pitchfork weed, sticktight, sticktights, tickseed sunflower | Bidens frondosa | Native | |
| burningbush, common kochia, fireweed, Mexican burningbush, Mexican fireweed, Mexican-fireweed, mock cypress, summercypress | Kochia scoparia | Non-native | |
| burrobrush, white burrobrush | Hymenoclea salsola | Native | |
| burrobush, white bursage | Ambrosia dumosa | Native | |
| burrograss | Scleropogon brevifolius | Native | |
| bush encelia, button brittlebush | Encelia frutescens | Native | |
| bush muhly | Muhlenbergia porteri | Native | |
| bush oceanspray, rockspirea | Holodiscus dumosus | Native | |
| bush peavine, bush vetchling | Lathyrus eucosmus | Native | |
| bush-clover dodder, field dodder, fiveangle dodder, fiveangled dodder | Cuscuta pentagona var. pentagona | Native | |
| bushy bluestem | Andropogon glomeratus | Native | |
| butterfly milkweed, butterflyweed | Asclepias tuberosa | Native | |
| button brittlebush, resin brittlebush | Encelia frutescens var. resinosa | Native | |
| buttonweed, cheeseplant, cheeseweed, common mallow, dwarf mallow, roundleaf mallow | Malva neglecta | Non-native | |
| cactus apple, desert pricklypear, Engelmann’s pricklypear | Opuntia engelmannii var. engelmannii | Native | |
| Cainville thistle | Cirsium calcareum | Native | |
| California ayenia, compact ayenia | Ayenia compacta | Native | |
| California barrel cactus, campus barrel cactus | Ferocactus cylindraceus var. cylindraceus | Native | |
| California barrel cactus, yellowspine barrel cactus | Ferocactus cylindraceus var. eastwoodiae | Native | |
| California bearpoppy | Arctomecon californica | Native | |
| California brickellbush, Jepson’s brickellbush | Brickellia californica | Native | |
| California brome, mountain brome | Bromus carinatus | Native | |
| California caltrop | Kallstroemia californica | Native | |
| California chicory, California plumeseed | Rafinesquia californica | Native | |
| California cottonrose, California fluffweed | Filago californica | Native | |
| California dock, toothed willow dock | Rumex salicifolius var. denticulatus | Native | |
| California dodder, chaparral dodder | Cuscuta californica | Native | |
| California false pennyroyal, California falsepennyroyal | Hedeoma nana ssp. californica | Native | |
| California goldenpoppy, California poppy | Eschscholzia californica | Native | |
| California loosestrife | Lythrum californicum | Native | |
| California mountain maple, Douglas’ maple, dwarf maple, mountain maple, New Mexico maple, Rocky Mountain maple, Sierra maple | Acer glabrum | Native | |
| California mustard, coast wild cabbage, hairyleaf wildcabbage | Guillenia lasiophylla | Native | |
| California nettle, stinging nettle | Urtica dioica ssp. gracilis | Native | |
| California poppy, Mexican goldenpoppy, Mexican goldpoppy | Eschscholzia californica ssp. mexicana | Native | |
| California redbud | Cercis orbiculata | Native | |
| California satintail, satintail | Imperata brevifolia | Native | |
| California sawgrass | Cladium californicum | Native | |
| Californian thistle, Canada thistle, Canadian thistle, creeping thistle, field thistle | Cirsium arvense | Non-native | |
| camelthorn | Alhagi maurorum | Common | Non-native |
| Canada bluegrass, flat-stem blue grass | Poa compressa | Non-native | |
| Canada cocklebur, cocklebur, cockleburr, common cocklebur, rough cocklebur, rough cockleburr | Xanthium strumarium | Native | |
| Canada goldenrod, Canadian goldenrod | Solidago canadensis var. scabra | Native | |
| Canada goldenrod, Canadian goldenrod, common goldenrod | Solidago canadensis | Native | |
| Canada horseweed, Canadian horseweed, horseweed, horseweed fleabane, mares tail, marestail | Conyza canadensis | Non-native | |
| Canada violet, Canadian white violet | Viola canadensis | Native | |
| Canada wildrye | Elymus canadensis | Native | |
| Canadian goldenrod, shorthair goldenrod | Solidago canadensis var. gilvocanescens | Native | |
| Canadian horseweed | Conyza canadensis var. pusilla | Native | |
| Canadian poplar, Carolina poplar | Populus X canadensis | Non-native | |
| Canadian rockcress, Drummond rockcress, Drummond’s rockcress | Arabis drummondii | Native | |
| canaigre, canaigre dock | Rumex hymenosepalus | Native | |
| Canby’s aster | Symphyotrichum foliaceum var. canbyi | Native | |
| candy grass, lovegrass, stink grass, stinkgrass, strongscented lovegrass | Eragrostis cilianensis | Non-native | |
| cane beardgrass, cane bluestem | Bothriochloa barbinodis | Native | |
| canyon bog orchid, sparse-flowered bog orchid | Platanthera sparsiflora | Native | |
| canyon cupgrass, southwest cupgrass | Eriochloa lemmonii | Native | |
| canyon grape | Vitis arizonica | Native | |
| canyonlands sedge, Kaibab sedge | Carex curatorum | Native | |
| capitate catseye, capitate cryptantha | Cryptantha capitata | Native | |
| cardinalflower | Lobelia cardinalis | Native | |
| careless weed, redroot amaranth, red-root amaranth, redroot pigweed, rough pigweed | Amaranthus retroflexus | Non-native | |
| carelessweed, Palmer’s amaranth | Amaranthus palmeri | Native | |
| Carolina draba, Carolina whitlowgrass, creeping draba | Draba reptans | Native | |
| carpet bentgrass, creeping bent, creeping bentgrass, redtop, redtop bent, seaside bentgrass, spreading bent | Agrostis stolonifera | Non-native | |
| carrot-leaf desert-parsley, MacDougal’s biscuitroot | Lomatium foeniculaceum ssp. macdougalii | Native | |
| Carruth’s sagebrush, Carruth’s sagewort | Artemisia carruthii | Native | |
| catchfly, sleepy campion, sleepy catchfly, sleepy silene | Silene antirrhina | Native | |
| catclaw, catclaw acacia, devilsclaw, Gregg’s catclaw, Texas catclaw | Acacia greggii | Common | Native |
| caterpillarweed, cleftleaf wildheliotrope, notch-leaf scorpion-weed | Phacelia crenulata | Native | |
| caterpillarweed, purplestem phacelia | Phacelia crenulata var. ambigua | Native | |
| catmint, catnip, catwort, field balm | Nepeta cataria | Non-native | |
| cavedwelling evening primrose, cavedwelling eveningprimrose, cavedwelling evening-primrose | Oenothera cavernae | Native | |
| cave-dwelling primrose | Primula specuicola | Native | |
| celeryleaf buttercup, cursed buttercup | Ranunculus sceleratus | Non-native | |
| cereal rye, common rye, cultivated annual rye, cultivated rye, rye | Secale cereale | Uncommon | Non-native |
| chaffbush, Fremont’s chaffbush | Amphipappus fremontii ssp. spinosus | Native | |
| Chambers’ twinpod | Physaria chambersii | Native | |
| Chamisso arnica | Arnica chamissonis | Native | |
| Chamisso arnica | Arnica chamissonis ssp. foliosa | Native | |
| chamomile, dog fennel, dogfennel, mayweed, mayweed chamomile, mayweed dogfennel, stinking chamomile, stinkweed | Anthemis cotula | Non-native | |
| chaparral fleabane | Erigeron oreophilus | Native | |
| chaparral yucca | Yucca whipplei | Native | |
| chardon penche, musk thistle, nodding plumeless thistle, nodding plumeless-thistle, nodding thistle, plumeless thistle | Carduus nutans | Non-native | |
| Charleston Mountain silverbush | Argythamnia cyanophylla | Native | |
| cheat grass, cheatgrass, downy brome, early chess, military grass, wild oats | Bromus tectorum | Non-native | |
| cheeseweed, cheeseweed mallow, small-whorl mallow | Malva parviflora | Non-native | |
| chestnut milkvetch, chestnut milk-vetch | Astragalus castaneiformis | Native | |
| chickweed, common chickweed, nodding chickweed | Stellaria media | Non-native | |
| Chilean chess | Bromus berterianus | Non-native | |
| China lettuce, prickly lettuce, wild lettuce | Lactuca serriola | Non-native | |
| China tamarisk, Chinese saltcedar, Chinese tamarisk, fivestamen tamarisk, five-stamen tamarisk, saltcedar, tamarisk, tamarix | Tamarix chinensis | Non-native | |
| Chinese elm, Siberian elm | Ulmus pumila | Non-native | |
| Chinle saltbush | Atriplex asterocarpa | Native | |
| Chiricahua Mountain columbine | Aquilegia triternata | Native | |
| chokecherry, common chokecherry, Virginia chokecherry | Prunus virginiana | Native | |
| chuckwalla combseed | Pectocarya heterocarpa | Native | |
| chufa flatsedge, yellow nutgrass, yellow nutsedge | Cyperus esculentus | Native | |
| cigue maculee, cigue tachetee, deadly hemlock, poison hemlock, poison parsley, poison-hemlock | Conium maculatum | Non-native | |
| cinchweed, cinchweed fetidmarigold, manybristle chinchweed, manybristle cinchweed | Pectis papposa | Native | |
| cinder phacelia, saw phacelia, saw scorpion-weed | Phacelia serrata | Native | |
| clammyweed, redwhisker clammyweed, red-whisker clammyweed, roughseed clammyweed | Polanisia dodecandra | Native | |
| clammyweed, red-whisker clammyweed, sandyseed clammyweed, western clammyweed | Polanisia dodecandra ssp. trachysperma | Native | |
| claretcup hedgehog, kingcup cactus, Mojave mound cactus | Echinocereus triglochidiatus | Native | |
| clasping pepperweed, clasping pepperwort, claspingleaf pepperweed | Lepidium perfoliatum | Non-native | |
| cleftleaf scorpion-weed, cleftleaf wildheliotrope, wildheliotrope | Phacelia crenulata var. corrugata | Native | |
| Cleveland’s desert dandelion, Cleveland’s desertdandelion | Malacothrix clevelandii | Native | |
| cliff false goldenaster, cliff falsegoldenaster | Heterotheca viscida | Native | |
| cliff fendlerbush, fendlerbush | Fendlera rupicola | Native | |
| climbing snapdragon, roving sailor | Maurandella antirrhiniflora | Native | |
| cloaked bulrush, pale bulrush | Scirpus pallidus | Native | |
| cloud sedge, Hayden sedge, Hayden’s sedge | Carex haydeniana | Native | |
| cluster tarweed, mountain tarplant, mountain tarweed | Madia glomerata | Native | |
| clustered broomrape, clustered broom-rape, purple broomrape, tufted broomrape | Orobanche fasciculata | Native | |
| clustered field sedge, slim sedge | Carex praegracilis | Native | |
| clustered wheat grass, desert wheatgrass | Agropyron desertorum | Non-native | |
| coast buckthorn, coast fiddleneck, common fiddleneck, intermediate fiddleneck | Amsinckia menziesii var. intermedia | Native | |
| coast willowweed, fringed willowherb | Epilobium ciliatum ssp. ciliatum | Native | |
| coastal sandbur | Cenchrus spinifex | Non-native | |
| Cochise scaly cloakfern, jimmyfern | Astrolepis cochisensis ssp. cochisensis | Native | |
| cocksfoot, orchard grass, orchardgrass | Dactylis glomerata | Non-native | |
| cold-desert phlox, Stansbury’s phlox | Phlox stansburyi | Native | |
| cold-desert phlox, Stansbury’s phlox | Phlox stansburyi ssp. stansburyi | Native | |
| Colorado blue columbine | Aquilegia caerulea | Native | |
| Colorado blue columbine | Aquilegia caerulea var. pinetorum | Native | |
| Colorado fescue | Festuca brachyphylla ssp. coloradensis | Native | |
| Colorado four o’clock, Colorado four-o’clock, manyflowered four-o’clock | Mirabilis multiflora | Native | |
| Colorado pinyon, nut pine, piñon pine, pinyon, pinyon pine, two-leaf pinyon, twoneedle pinyon, two-needle pinyon | Pinus edulis | Native | |
| Colorado rubberweed | Hymenoxys richardsonii var. floribunda | Native | |
| Colorado rubberweed, pingue, pingue hymenoxys, pingue rubberweed | Hymenoxys richardsonii | Native | |
| Colorado rush | Juncus confusus | Native | |
| colored smartweed, devil’s shoestring, longroot smartweed, swamp smartweed, tanweed | Polygonum amphibium var. emersum | Native | |
| Columbia needlegrass, Dore’s needlegrass | Achnatherum nelsonii ssp. dorei | Native | |
| Columbia needlegrass, Nelson achnatherum | Achnatherum nelsonii | Native | |
| Columbia needlegrass, Nelson needlegrass | Achnatherum nelsonii ssp. nelsonii | Native | |
| Columbian monkshood | Aconitum columbianum | Native | |
| Columbian spruce, Engelmann spruce, Engelmann’s spruce, mountain spruce, silver spruce, white spruce | Picea engelmannii | Native | |
| Columbian virginsbower, rock clematis | Clematis columbiana var. columbiana | Native | |
| combbur, curvenut combseed, recurve combseed | Pectocarya recurvata | Native | |
| common alumroot, littleleaf alumroot, little-leaf alumroot | Heuchera parvifolia | Native | |
| common balm | Melissa officinalis | Uncommon | Non-native |
| common dandelion, lesser hawkbit, wandering dandelion | Taraxacum officinale ssp. officinale | Non-native | |
| common dogbane, dogbane, hemp dogbane, Indian hemp, Indian-hemp, prairie dogbane | Apocynum cannabinum | Native | |
| common dogweed, fiveneedle pricklyleaf | Thymophylla pentachaeta var. pentachaeta | Native | |
| common dunebroom, dune broom | Parryella filifolia | Native | |
| common fig, edible fig, fiku, piku | Ficus carica | Non-native | |
| common fishhook cactus, corkseed pincushion cactus | Mammillaria tetrancistra | Native | |
| common fox sedge, fox sedge | Carex vulpinoidea | Native | |
| common groundsel, old-man-in-the-spring | Senecio vulgaris | Common | Non-native |
| common henbit, giraffehead, henbit, henbit deadnettle | Lamium amplexicaule | Occasional | Non-native |
| common hoptree | Ptelea trifoliata ssp. angustifolia | Native | |
| common hoptree, hoptree | Ptelea trifoliata | Native | |
| common horsetail, field horsetail, scouringrush, western horsetail | Equisetum arvense | Native | |
| common houndstongue, gypsyflower, gypsy-flower, hound’s tongue, houndstongue | Cynoglossum officinale | Non-native | |
| common juniper | Juniperus communis var. depressa | Native | |
| common juniper, dwarf juniper | Juniperus communis | Native | |
| common lambsquarters, lambsquarters, lambsquarters goosefoot, white goosefoot | Chenopodium album | Non-native | |
| common maidenhair, common maidenhair fern, venus hairfern | Adiantum capillus-veneris | Native | |
| common Mediterranean grass, Mediterranean grass, Mediterraneangrass | Schismus barbatus | Non-native | |
| common monkeyflower, seep monkeyflower | Mimulus guttatus | Native | |
| common pear, pear | Pyrus communis | Non-native | |
| common pearlyeverlasting, pearly everlasting, pearly-everlasting, western pearly everlasting, western pearlyeverlasting | Anaphalis margaritacea | Native | |
| common pepperweed, greenflower pepperweed, miners’ pepperweed, miner’s pepperwort, peppergrass, prairie pepperweed | Lepidium densiflorum | Native | |
| common periwinkle, lesser periwinkle, myrtle | Vinca minor | Non-native | |
| common prickly gilia, granite gilia, granite prickly gilia, granite prickly phlox | Leptodactylon pungens | Native | |
| common red raspberry, grayleaf raspberry, grayleaf red raspberry, red raspberry | Rubus idaeus ssp. strigosus | Native | |
| common reed | Phragmites australis | Native | |
| common sagewort, field sagewort, Pacific wormwood, wormwood sagewort | Artemisia campestris | Native | |
| common salsify, goat’s beard, goatsbeard, meadow goat’s-beard, salsifis majeur, salsify, western goat’s beard, western salsify, wild oysterplant, yellow goat’s beard, yellow salsify | Tragopogon dubius | Non-native | |
| common salsify, goatsbeard, purple salsify, salsify | Tragopogon porrifolius | Non-native | |
| common sandweed, dwarf anthysanus | Athysanus pusillus | Native | |
| common selfheal, heal all, healall, selfheal | Prunella vulgaris | Non-native | |
| common sheep sorrel, field sorrel, red sorrel, sheep sorrel | Rumex acetosella | Non-native | |
| common silverbush, New Mexico ditaxis, New Mexico silverbush | Argythamnia neomexicana | Native | |
| common spikerush, creeping spikerush, creeping spike-rush, marsh spike-rush, spikesedge | Eleocharis palustris | Native | |
| common tansy, garden tansy, golden-buttons, tansy | Tanacetum vulgare | Non-native | |
| common threesquare | Schoenoplectus pungens var. longispicatus | Native | |
| common timothy, timothy | Phleum pratense | Non-native | |
| common wheat, wheat | Triticum aestivum | Non-native | |
| common wolfstail, wolftail | Lycurus phleoides | Native | |
| common yampah, Gardner’s yampah, Indian caraway | Perideridia gairdneri | Native | |
| common yarrow, western yarrow | Achillea millefolium var. occidentalis | Native | |
| compact brome, Spanish brome | Bromus madritensis | Non-native | |
| compact monkeyflower, compact monkey-flower | Mimulus spissus | Native | |
| compact rockdaisy, compacted rockdaisy, Grand Canyon rockdaisy | Perityle congesta | Native | |
| Cooper’s broomrape, desert broomrape | Orobanche cooperi | Native | |
| Cooper’s hymenoxys, Cooper’s rubberweed | Hymenoxys cooperi | Native | |
| Cooper’s wild cabbage, Cooper’s wildcabbage | Caulanthus cooperi | Native | |
| copal tree, tree of heaven, tree-of-heaven | Ailanthus altissima | Non-native | |
| copperweed | Iva acerosa | Native | |
| coralberry, roundleaf snowberry | Symphoricarpos rotundifolius | Native | |
| coralroot, spring coralroot | Corallorrhiza wisteriana | Native | |
| cornilla real, field melilot, ribbed melilot, yellow sweetclover, yellow sweet-clover | Melilotus officinalis | Non-native | |
| corymbed buckwheat, corymbed wildbuckwheat, crispleaf buckwheat, white buckwheat | Eriogonum corymbosum | Native | |
| cosmopolitan bulrush | Schoenoplectus maritimus | Native | |
| cotton thistle, heraldic thistle, Scotch cotton thistle, Scotch cottonthistle, Scotch thistle | Onopordum acanthium | Non-native | |
| cottontop barrel cactus, cottontop cactus | Echinocactus polycephalus | Native | |
| cottontop cactus | Echinocactus polycephalus var. polycephalus | Native | |
| cottontop cactus | Echinocactus polycephalus var. xeranthemoides | Native | |
| cottonwood, Fremont’s cottonwood | Populus fremontii | Native | |
| Coues’ cassia, Coves’ cassia, desert senna | Senna covesii | Native | |
| Coulter’s brickellbush | Brickellia coulteri | Native | |
| coyote gourd, coyote melon | Cucurbita palmata | Native | |
| coyote tabacco, coyote tobacco | Nicotiana attenuata | Native | |
| coyote willow, desert willow, narrowleaf willow, sandbar willow | Salix exigua | Native | |
| crabgrass, hairy crab grass, hairy crabgrass, large crabgrass, purple crabgrass, redhair crabgrass | Digitaria sanguinalis | Non-native | |
| creeping barberry, creeping mahonia, Oregon grape, Trunkee barberry | Mahonia repens | Native | |
| creeping jenny, European bindweed, field bindweed, perennial morningglory, smallflowered morningglory | Convolvulus arvensis | Non-native | |
| creeping muhly, red muhly | Muhlenbergia repens | Native | |
| creeping nailwort, low nailwort, nailwort, stemless nailwort | Paronychia sessiliflora | Native | |
| creeping penstemon, toadflax penstemon | Penstemon linarioides | Native | |
| creeping spiderling | Boerhavia spicata | Native | |
| creeping St. Johnswort, tinker’s penny, tinker’s-penny | Hypericum anagalloides | Native | |
| creeping wildrye, false quackgrass | Elymus X pseudorepens | Native | |
| creosote bush, creosotebush | Larrea tridentata | Native | |
| creosote bush, creosotebush | Larrea tridentata var. tridentata | Native | |
| Crescent milkvetch | Astragalus amphioxys | Native | |
| crested needlegrass, little Parish’s needlegrass | Achnatherum parishii var. depauperatum | Native | |
| crimson bluestem, crimson false bluestem | Schizachyrium sanguineum var. hirtiflorum | Native | |
| crimson monkeyflower | Mimulus cardinalis | Native | |
| crimson monkeyflower, crimson monkey-flower | Mimulus verbenaceus | Native | |
| crimson sage | Salvia henryi | Native | |
| crinklemat, mat tiquilia, matted crinklemat | Tiquilia latior | Native | |
| crispleaf buckwheat | Eriogonum corymbosum var. corymbosum | Native | |
| crispleaf buckwheat | Eriogonum corymbosum var. glutinosum | Native | |
| Cronquist’s blazingstar | Mentzelia cronquistii | Native | |
| crownleaf evening primrose, crownleaf eveningprimrose, crownleaf evening-primrose | Oenothera coronopifolia | Native | |
| crucifixion thorn | Canotia holacantha | Native | |
| cudweed sagewort, gray sagewort, Louisiana sagewort, Louisiana wormwood, mugwort wormwood, prairie sage, white sagebrush | Artemisia ludoviciana | Native | |
| cudweed, everlasting, Wright’s cudweed | Pseudognaphalium canescens ssp. canescens | Native | |
| cudweed, lowland cudweed, marsh everlasting, western marsh cudweed | Gnaphalium palustre | Native | |
| Cuman ragweed, perennial ragweed, western ragweed | Ambrosia psilostachya | Native | |
| curlleaf cercocarpus, curl-leaf mountain-mahogany | Cercocarpus ledifolius | Native | |
| curltop ladysthumb, curlytop knotweed, curlytop smartweed, dock-leaf smartweed, nodding smartweed, pale smartweed | Polygonum lapathifolium | Native | |
| curly dock, narrowleaf dock, sour dock, yellow dock | Rumex crispus | Non-native | |
| curly pondweed, curly-leaved pondweed | Potamogeton crispus | Non-native | |
| curlycup gumweed, curly-cup gumweed, curlytop gumweed, gumweed, rosinweed, tarweed | Grindelia squarrosa var. serrulata | Native | |
| curlycup gumweed, curlytop gumweed, gumweed, rosinweed, tarweed | Grindelia squarrosa | Native | |
| curlyhead goldenweed | Pyrrocoma crocea var. crocea | Native | |
| curlyhead goldenweed | Pyrrocoma crocea var. genuflexa | Native | |
| curlytop gumweed, rayless gumweed | Grindelia nuda var. aphanactis | Native | |
| currant-leaf globe-mallow, gooseberryleaf globemallow | Sphaeralcea grossulariifolia | Native | |
| curvednut cryptantha, curvenut catseye, curvenut cryptantha | Cryptantha recurvata | Native | |
| curvepod fumewort | Corydalis curvisiliqua ssp. occidentalis | Native | |
| cushion buckwheat, cushion wild buckwheat | Eriogonum ovalifolium var. ovalifolium | Native | |
| cushion buckwheat, cushion wild buckwheat, ovalleaf eriogonum | Eriogonum ovalifolium | Native | |
| cushion catseye, cushion cryptantha, matted cryptantha | Cryptantha circumscissa | Native | |
| cutleaf globemallow, Rusby’s globemallow | Sphaeralcea rusbyi | Native | |
| cutleaf goldenweed, cutleaf machaeranthera, hoary tansyaster | Machaeranthera canescens ssp. canescens var. incana | Native | |
| cutleaf goldenweed, lacy tansyaster, lacy tansy-aster, pinnate machaeranthera, spiny goldenweed | Machaeranthera pinnatifida | Native | |
| cutleaf nightshade, cut-leaf nightshade | Solanum triflorum | Native | |
| cutleaf vipergrass | Scorzonera laciniata | Common | Non-native |
| cutleaf waterparsnip, cut-leaf-water-parsnip, stalky berula | Berula erecta | Native | |
| cutleaf, fineleaf hymenopappus, fine-leaf woollywhite | Hymenopappus filifolius | Native | |
| Cutler’s ephedra, Cutler’s jointfir, Cutler’s Mormon tea | Ephedra cutleri | Native | |
| dainty desert hideseed, desert eucrypta, desert hideseed | Eucrypta micrantha | Native | |
| Dakota mock vervain | Glandularia bipinnatifida | Native | |
| Dakota mock vervain, Dakota verbena | Glandularia bipinnatifida var. bipinnatifida | Native | |
| dallas grass, dallis grass, dallisgrass, herbe de miel, herbe sirop, hiku nua, palpalum dilate, water grass | Paspalum dilatatum | Non-native | |
| Dalmatian toadflax, Dalmation toadflax | Linaria dalmatica | Non-native | |
| darkthroat shootingstar, dark-throat shootingstar, southern shootingstar | Dodecatheon pulchellum | Native | |
| date palm | Phoenix dactylifera | Non-native | |
| Davidson’s sage | Salvia davidsonii | Native | |
| Death Valley phacelia, Death valley scorpion-weed | Phacelia vallis-mortae | Native | |
| deer ears, elkweed, green gentian, monument plant, monument-plant, showy frasera | Frasera speciosa | Native | |
| deer goldenbush, deer heathgoldenrod, deer heath-goldenrod | Ericameria cervina | Native | |
| deerpea vetch, Louisiana vetch, slim vetch | Vicia ludoviciana | Native | |
| deertongue, thick-sepal catseye, thicksepal cryptantha | Cryptantha crassisepala | Native | |
| dense desert phlox, dense mountain phlox | Phlox austromontana ssp. densa | Native | |
| desert almond, desert peach | Prunus fasciculata | Native | |
| desert Anderson wolfberry, water jacket | Lycium andersonii var. deserticola | Native | |
| desert baccharis, squaw waterweed baccharis | Baccharis sergiloides | Native | |
| desert baileya, desert marigold | Baileya multiradiata | Native | |
| desert bedstraw, starry bedstraw | Galium stellatum ssp. eremicum | Native | |
| desert blazingstar, spinyhair blazingstar, spinyhair stickleaf | Mentzelia tricuspis | Native | |
| desert ceanothus | Ceanothus greggii | Native | |
| desert centaury, Great Basin centaury | Centaurium exaltatum | Native | |
| desert chicory, New Mexico plumeseed | Rafinesquia neomexicana | Native | |
| desert elkweed, desert frasera | Frasera albomarginata | Native | |
| desert eriastrum, desert woollystar, desert woolstar | Eriastrum eremicum | Native | |
| desert evening primrose, desert eveningprimrose, desert evening-primrose | Oenothera primiveris | Native | |
| desert false indigo, desert indigobush, dullleaf indigo, false indigo, false indigobush, indigobush, leadplant | Amorpha fruticosa | Native | |
| desert flax, plains flax | Linum puberulum | Native | |
| desert globemallow | Sphaeralcea ambigua | Native | |
| desert gold, golden deserttrumpets, golden desert-trumpets, golden linanthus | Linanthus aureus | Native | |
| desert goldenpoppy, desert poppy | Eschscholzia glyptosperma | Native | |
| desert gooseberry | Ribes velutinum | Native | |
| desert goosefoot | Chenopodium pratericola | Native | |
| desert hibiscus, paleface, rock hibiscus | Hibiscus denudatus | Native | |
| desert holly, desertholly, Yuma desert holly | Atriplex hymenelytra | Native | |
| desert horsepurslane, desert horse-purslane, horse purslane | Trianthema portulacastrum | Native | |
| desert Indian paintbrush, Martin’s paintbrush, wavyleaf Indian paintbrush | Castilleja applegatei ssp. martinii | Native | |
| desert Indianwheat | Plantago ovata | Native | |
| desert larkspur | Delphinium parishii | Native | |
| desert linanthus, desertsnow | Linanthus demissus | Native | |
| desert mountain phlox, desert phlox, mountain phlox | Phlox austromontana | Native | |
| desert mountain phlox, mountain phlox | Phlox austromontana ssp. austromontana | Native | |
| desert needlegrass | Achnatherum speciosum | Native | |
| desert neststraw, woolly neststraw, woollyhead neststraw | Stylocline micropoides | Native | |
| desert olive, downy forestiera, elbowbush, stretchberry | Forestiera pubescens | Native | |
| desert pale gilia, desert pale gily-flower, Hutchin’s gilia | Gilia hutchinsifolia | Native | |
| desert penstemon | Penstemon pseudospectabilis | Native | |
| desert pepperweed | Lepidium fremontii | Native | |
| desert prince’s-plume, golden prince’s-plume | Stanleya pinnata | Native | |
| desert rabbitbrush, Mojave rabbitbrush | Ericameria paniculata | Native | |
| desert rock nettle, desert stingbush, stingbush | Eucnide urens | Native | |
| desert rose, Grand Cayon rose | Rosa stellata ssp. abyssa | Native | |
| desert rose, star rose | Rosa stellata | Native | |
| desert saltgrass, inland saltgrass, marsh spikegrass, saltgrass, seashore saltgrass | Distichlis spicata | Native | |
| desert seepweed | Suaeda suffrutescens | Native | |
| desert snowberry, longleaf snowberry | Symphoricarpos longiflorus | Native | |
| desert stickseed, flat-spine sheepburr, flatspine stickseed, western stickseed | Lappula occidentalis var. occidentalis | Native | |
| desert sunflower, western sunflower | Helianthus anomalus | Native | |
| desert sweet, fernbush | Chamaebatiaria millefolium | Native | |
| desert tobacco, Indian tobacco | Nicotiana obtusifolia var. obtusifolia | Native | |
| desert tobacco, tobacco plant | Nicotiana obtusifolia | Native | |
| desert trumpet, Native American buckwheat | Eriogonum inflatum var. inflatum | Native | |
| desert trumpet, Native American pipeweed | Eriogonum inflatum | Native | |
| desert twinbugs | Dicoria canescens | Native | |
| desert vervain, Goodding’s verbena, southwestern mock vervain | Glandularia gooddingii | Native | |
| desert willow | Chilopsis linearis | Native | |
| desert windflower, tuber anemone | Anemone tuberosa | Native | |
| desertmarigold baileya, woolly desert marigold, woolly desert-marigold | Baileya pleniradiata | Native | |
| Devils Canyon muhly, spreading littleseed muhly | Muhlenbergia appressa | Native | |
| devil’s spineflower, spiny chorizanthe, turkshead | Chorizanthe rigida | Native | |
| devilsclaw, doubleclaw | Proboscidea parviflora | Native | |
| devilweed aster, Mexican devilweed, spiny aster, spiny chloracantha | Chloracantha spinosa | Native | |
| diamondleaf saxifrage, diamond-leaf saxifrage | Saxifraga rhomboidea | Native | |
| diffuse eriastrum, diffuse woolstar, miniature woollystar, miniature woolstar | Eriastrum diffusum | Native | |
| diffuse knapweed, white knapweed | Centaurea diffusa | Non-native | |
| disc mayweed, pineapple weed, pineappleweed | Matricaria discoidea | Abundant | Non-native |
| distant phacelia, distant scorpion-weed | Phacelia distans | Native | |
| ditch polypogon, ditch rabbitsfoot grass, ditch rabbit’sfootgrass | Polypogon interruptus | Non-native | |
| ditch reedgrass, Jones reedgrass | Calamagrostis scopulorum | Native | |
| dollarjoint pricklypear, pancake pricklypear | Opuntia chlorotica | Native | |
| dotted smartweed | Polygonum punctatum | Native | |
| double bladder freckled milkvetch, freckled milkvetch, speckledpod milkvetch | Astragalus lentiginosus var. diphysus | Native | |
| doubting mariposa lily | Calochortus ambiguus | Native | |
| Douglas dustymaiden, Douglas’ dustymaiden, Douglas’ pincushion, dusty maiden, dusty-maiden | Chaenactis douglasii | Native | |
| Douglas fir dwarf mistletoe | Arceuthobium douglasii | Native | |
| Douglas’ knotweed | Polygonum douglasii | Native | |
| Douglas rabbitbrush, Douglas’ rabbitbrush, green rabbitbrush, yellow rabbitbrush | Chrysothamnus viscidiflorus | Native | |
| Douglas’ rabbitbrush, low rabbitbrush, yellow rabbitbrush | Chrysothamnus viscidiflorus ssp. axillaris | Native | |
| Douglas spruce, Douglas-fir, Oregon pine, red fir | Pseudotsuga menziesii | Native | |
| doveweed, goatweed, skunkweed, Texas croton | Croton texensis | Native | |
| downy brome, soft brome | Bromus hordeaceus ssp. hordeaceus | Non-native | |
| dozing phacelia, dozing scorpion-weed, nodding phacelia | Phacelia laxiflora | Native | |
| Drummond’s false pennyroyal, Drummond’s pennyroyal | Hedeoma drummondii | Native | |
| Drummond’s goldenbush, Drummond’s goldenweed, Drummond’s jimmyweed | Isocoma drummondii | Native | |
| Drummond’s thistle, elk thistle, leafy thistle, meadow thistle | Cirsium foliosum | Native | |
| dryspike sedge, dry-spike sedge, silvertop sedge | Carex foenea var. foenea | Native | |
| Duane milkvetch, Duane’s milkvetch | Astragalus pinonis var. atwoodii | Native | |
| Dudley rush, Dudley’s rush | Juncus dudleyi | Native | |
| dune scurfpea, lemon scurfpea, wild lemonweed | Psoralidium lanceolatum | Native | |
| Dutch clover, ladino clover, white clover, white Dutch clover | Trifolium repens | Non-native | |
| dwarf abutilon, dwarf Indian mallow | Abutilon parvulum | Native | |
| dwarf blazingstar, dwarf mentzelia, golden blazingstar | Mentzelia pumila | Native | |
| dwarf blueeyed grass, dwarf blue-eyed grass, stiff blue-eyed grass, stiff blue-eyed-grass | Sisyrinchium demissum | Native | |
| dwarf false pennyroyal, dwarf pennyroyal, false pennyroyal | Hedeoma nana | Native | |
| dwarf false pennyroyal, false pennyroyal, falsepennyroyal | Hedeoma nana ssp. nana | Native | |
| dwarf four o’clock, dwarf four-o’clock, little four-o’clock | Mirabilis pumila | Native | |
| dwarf goldenrod | Solidago simplex ssp. simplex var. nana | Native | |
| dwarf hesperochiron | Hesperochiron pumilus | Native | |
| dwarf lousewort | Pedicularis centranthera | Native | |
| dwarf rabbitbrush, longflower rabbitbrush | Chrysothamnus depressus | Native | |
| dwarf rattlesnake-plantain, lesser rattlesnake plantain | Goodyera repens | Native | |
| dwarf sand verbena | Abronia nana | Native | |
| dwarf serviceberry | Amelanchier pumila | Native | |
| dwarf stickpea, mountain calliandra | Calliandra humilis | Native | |
| eagle fern, hairy brackenfern, western bracken, western brackenfern | Pteridium aquilinum var. pubescens | Native | |
| Eastern Mojave buckwheat, flattop buckwheat, Mojave buckwheat | Eriogonum fasciculatum var. polifolium | Native | |
| Eastwood’s sandwort | Arenaria eastwoodiae | Native | |
| Eaton’s daisy, Eaton’s fleabane | Erigeron eatonii | Native | |
| Eaton’s lip fern, Eaton’s lipfern | Cheilanthes eatonii | Native | |
| Eaton’s penstemon, firecracker penstemon | Penstemon eatonii | Native | |
| Eaton’s penstemon, firecracker penstemon | Penstemon eatonii ssp. undosus | Native | |
| edible valerian, tobacco root, tobaccoroot | Valeriana edulis | Native | |
| egg milkvetch | Astragalus oophorus | Native | |
| egg milkvetch, pallid egg milkvetch | Astragalus oophorus var. caulescens | Native | |
| eight-flower six-weeks grass, pullout grass, sixweeks fescue, sixweeks grass | Vulpia octoflora | Native | |
| elkslip marshmarigold, slendersepal marshmarigold, white marsh marigold, white marshmarigold, white marsh-marigold | Caltha leptosepala | Native | |
| elliptic shineleaf, large-leaved shineleaf, waxflower shinleaf | Pyrola elliptica | Native | |
| Emory’s baccharis | Baccharis emoryi | Native | |
| Emory’s desertmallow, Emory’s globemallow | Sphaeralcea emoryi | Native | |
| Emory’s milkvetch | Astragalus emoryanus | Native | |
| Emory’s rockdaisy, Emory’s rocklily | Perityle emoryi | Native | |
| Engelmann’s hedgehog cactus, strawberry cactus | Echinocereus engelmannii | Native | |
| Engelmann’s spikerush, Engelmann’s spike-rush | Eleocharis engelmannii | Native | |
| English elm | Ulmus procera | Non-native | |
| English ivy | Hedera helix | Non-native | |
| entireleaf thelypody, entire-leaf thelypody, entireleaved thelypody, smoothleaved thelypody | Thelypodium integrifolium | Native | |
| entireleaf thelypody, entireleaved thelypody | Thelypodium integrifolium ssp. longicarpum | Native | |
| ericameria, turpentine bush, turpentinebush | Ericameria laricifolia | Native | |
| Esteve’s pincushion, Steve’s dusty maiden, Steve’s dustymaiden, Steve’s pincushion | Chaenactis stevioides | Native | |
| European alkaligrass, spreading alkali grass, weeping alkaligrass | Puccinellia distans | Non-native | |
| European crab apple, European crabapple | Malus sylvestris | Non-native | |
| European cranberrybush, Guelder rose, viburnum | Viburnum opulus | Non-native | |
| European plum | Prunus domestica | Non-native | |
| everlasting peavine, everlasting-pea, perennial pea, perennial peavine, perennial sweetpea | Lathyrus latifolius | Uncommon | Non-native |
| eyed gilia, eyed gily-flower, eyelike gilia | Gilia ophthalmoides | Native | |
| fairy slipper, fairyslipper orchid | Calypso bulbosa var. americana | Native | |
| fairy slipper, fairyslipper, fairyslipper orchid, fairy-slipper orchid | Calypso bulbosa | Native | |
| false buffalo grass, false buffalograss | Monroa squarrosa | Native | |
| false carrot, false hedge-parsley, falsecarrot | Yabea microcarpa | Native | |
| false pennyroyal, falsepennyroyal, oblongleaf false pennyroyal | Hedeoma oblongifolia | Native | |
| false Solomon’s seal, little false Solomon’s-seal, star false Solomon’s-seal, star-flower Solomon’s-seal, starry false lily of the valley, starry false Solomon’s seal, starry false Solomon’s-seal, starry Solomon’s-seal | Maianthemum stellatum | Native | |
| false Solomon’s-seal, feather Solomon’s seal, feathery false lily of the valley, feathery false Solomon’s-seal | Maianthemum racemosum ssp. racemosum | Native | |
| false tarragon, green sagewort, silky wormwood, tarragon, wormwood | Artemisia dracunculus | Native | |
| fanweed, field pennycress, Frenchweed, pennycress, stinkweed | Thlaspi arvense | Non-native | |
| feather fingergrass, feather windmill grass, showy chloris | Chloris virgata | Native | |
| feather pappusgrass, nineawn pappusgrass, spike pappusgrass | Enneapogon desvauxii | Native | |
| feathery false lily of the valley, feathery false lily of the vally, western Solomon’s seal, western Solomon’s-seal | Maianthemum racemosum ssp. amplexicaule | Native | |
| Fee’s lipfern, slender lip fern, slender lipfern | Cheilanthes feei | Native | |
| Fendler groundcherry, Fendler’s groundcherry | Physalis hederifolia var. fendleri | Native | |
| fendler rockcress, Fendler’s rockcress | Arabis fendleri | Native | |
| Fendler spring parsley, Fendler’s springparsley | Cymopterus acaulis var. fendleri | Native | |
| Fendler threeawn, Fendler’s threeawn, red threeawn, red threeawn (Fendler) | Aristida purpurea var. longiseta | Native | |
| Fendler’s ceanothus | Ceanothus fendleri | Native | |
| Fendler’s cryptantha, sanddune catseye, sanddune cryptantha | Cryptantha fendleri | Native | |
| Fendler’s globemallow, thicket globe-mallow | Sphaeralcea fendleri | Native | |
| Fendler’s hedgehog cactus, pinkflower hedgehog cactus | Echinocereus fendleri var. fendleri | Native | |
| Fendler’s meadowrue, Fendler’s meadow-rue | Thalictrum fendleri | Native | |
| Fendler’s sandmat | Chamaesyce fendleri | Native | |
| Fendler’s sandwort | Arenaria fendleri | Native | |
| Fendler’s sandwort | Arenaria fendleri var. brevifolia | Native | |
| Ferris’ sandwort | Arenaria macradenia ssp. ferrisiae | Native | |
| Ferriss’ horsetail | Equisetum X ferrissii | Native | |
| fetid goosefoot | Chenopodium graveolens | Native | |
| fiddleleaf hawksbeard | Crepis runcinata ssp. glauca | Native | |
| field brome | Bromus arvensis | Non-native | |
| field chickweed, field mouse-ear chickweed, starry chickweed | Cerastium arvense | Native | |
| field mint, wild mint | Mentha arvensis | Native | |
| field rush, path rush, poverty rush, slender rush, slender yard rush, wiregrass | Juncus tenuis | Native | |
| field sagewort | Artemisia campestris ssp. borealis var. scouleriana | Native | |
| Filipes’ snapdragon, yellow twining snapdragon, yellow twining-snapdragon | Neogaerrhinum filipes | Native | |
| fineleaf hymenopappus | Hymenopappus filifolius var. pauciflorus | Native | |
| fineleaf hymenopappus, Idaho hymenopappus, yellow cutleaf | Hymenopappus filifolius var. lugens | Native | |
| fir dwarf mistletoe | Arceuthobium abietinum | Native | |
| firehair dogweed, fiveneedle pricklyleaf | Thymophylla pentachaeta var. belenidium | Native | |
| fireweed | Chamerion angustifolium ssp. circumvagum | Native | |
| fishhook pincushion, Graham’s nipple cactus | Mammillaria grahamii var. grahamii | Native | |
| fivehook bassia, fivehorn smotherweed, smotherweed | Bassia hyssopifolia | Non-native | |
| fiveneedle pricklyleaf, five-needle pricklyleaf | Thymophylla pentachaeta | Native | |
| fivenerve helianthella, nodding dwarf-sunflower, nodding helianthella | Helianthella quinquenervis | Native | |
| fivewing spiderling, five-wing spiderling, Jone’s boerhavia | Boerhavia intermedia | Native | |
| Flagstaff rockcress | Arabis gracilipes | Native | |
| flame buttercup, greater creeping spearwort | Ranunculus flammula var. flammula | Native | |
| flatbud prickly poppy, flatbud pricklypoppy | Argemone munita ssp. argentea | Native | |
| flatbud prickly poppy, flatbud pricklypoppy | Argemone munita ssp. rotundata | Native | |
| flat-bud prickly poppy, flatbud pricklypoppy | Argemone munita | Native | |
| flatcrown buckwheat | Eriogonum deflexum var. deflexum | Native | |
| flatcrown buckwheat, skeletonweed, skeletonweed buckwheat | Eriogonum deflexum | Native | |
| flat-spine sheepburr, flatspine stickseed | Lappula occidentalis var. cupulata | Native | |
| flaxflowered gilia, flaxflowered ipomopsis, white-flower skyrocket, whiteflowered gilia | Ipomopsis longiflora | Native | |
| flaxgrass, oatgrass, wheat oats, wild oat, wild oats | Avena fatua | Non-native | |
| flaxweed tansymustard, flixweed, flixweed tansymustard, herb sophia, herb-sophia, pinnate tansymustard, tansymustard | Descurainia sophia | Non-native | |
| fleshcolor pincushion, flesh-color pincushion, Xantus pincushion | Chaenactis xantiana | Native | |
| fluffgrass, low woollygrass | Dasyochloa pulchella | Native | |
| fogfruit, wedgeleaf, wedgeleaf fogfruit | Phyla cuneifolia | Native | |
| foothill deathcamas, sand-corn | Zigadenus paniculatus | Native | |
| forest muhly, woodland muhly | Muhlenbergia sylvatica | Native | |
| four o’clock, linearleaf four-o’clock, narrowleaf four o’clock, narrowleaf four-o’clock | Mirabilis linearis | Native | |
| fourwing saltbush | Atriplex canescens | Native | |
| fowl manna grass, fowl mannagrass | Glyceria striata | Native | |
| foxtail barley | Hordeum jubatum | Non-native | |
| foxtail brome, red brome | Bromus rubens | Non-native | |
| fragrant ash | Fraxinus cuspidata | Native | |
| fragrant bedstraw, sweet bedstraw, sweetscented bedstraw | Galium triflorum | Native | |
| fragrant snakeroot, herbaceous joepyeweed | Ageratina herbacea | Native | |
| fragrant white sand verbena | Abronia elliptica | Common | Native |
| Franciscan bluebells | Mertensia franciscana | Native | |
| freckled milkvetch, Kaibab Plateau milkvetch, speckledpod milkvetch | Astragalus lentiginosus var. oropedii | Native | |
| freckled milkvetch, southern freckled milkvetch, speckledpod milkvetch | Astragalus lentiginosus var. australis | Native | |
| freckled milkvetch, speckledpod milkvetch | Astragalus lentiginosus | Native | |
| freckled milkvetch, speckledpod milkvetch, straggling milkvetch | Astragalus lentiginosus var. palans | Native | |
| Fremont false dalea, Fremont’s dalea | Psorothamnus fremontii var. attenuatus | Native | |
| Fremont wolfberry, Fremont’s desert-thorn | Lycium fremontii | Native | |
| Fremont’s barberry, Fremont’s mahonia | Mahonia fremontii | Native | |
| Fremont’s geranium | Geranium caespitosum var. fremontii | Native | |
| Fremont’s goosefoot | Chenopodium fremontii | Native | |
| Fremont’s phacelia, Fremont’s scorpion-weed | Phacelia fremontii | Native | |
| Fremont’s pincushion, morningbride, pincushion flower | Chaenactis fremontii | Native | |
| fringed amaranth, fringed pigweed | Amaranthus fimbriatus | Native | |
| fringed brome | Bromus ciliatus | Native | |
| fringed gromwell, fringed puccoon, narrowleaf gromwell, narrowleaf pucoon, narrowleaf stoneseed, trumpet stoneseed | Lithospermum incisum | Native | |
| fringed sagebrush, fringed sagewort, prairie sagewort | Artemisia frigida | Native | |
| fringed twinevine | Funastrum cynanchoides | Native | |
| fringed twinevine | Funastrum cynanchoides ssp. cynanchoides | Native | |
| frosted mint, hoary rosemarymint, rosemary mint | Poliomintha incana | Native | |
| froststem suncup, frost-stem suncup | Camissonia multijuga | Native | |
| galleta, James’ galleta | Pleuraphis jamesii | Native | |
| Gambel’s oak | Quercus gambelii | Native | |
| garden tomato | Solanum lycopersicum var. lycopersicum | Non-native | |
| giant bird’s nest, giant pinedrops, woodland pinedrops | Pterospora andromedea | Native | |
| giant dropseed | Sporobolus giganteus | Native | |
| giant helleborine, stream orchid | Epipactis gigantea | Native | |
| giant red Indian paintbrush, great red Indian paintbrush, great red Indian-paintbrush, scarlet Indian paintbrush, scarlet paintbrush | Castilleja miniata | Native | |
| giant reed, giantreed | Arundo donax | Non-native | |
| gland cinquefoil, sticky cinquefoil | Potentilla glandulosa | Native | |
| glandleaf milkwort, purple milkwort | Polygala macradenia | Native | |
| glandular threadplant | Nemacladus glanduliferus var. orientalis | Native | |
| glandular threadplant, threadplant | Nemacladus glanduliferus | Native | |
| glandular willowherb, Hall’s willowweed | Epilobium halleanum | Native | |
| globed-podded hoarycress, heart-pod hoarycress, heart-podded hoarycress, hoary cress, peppergrass, pepperweed whitetop, whitetop, whiteweed | Cardaria draba | Non-native | |
| golden cholla, silver cholla | Opuntia echinocarpa | Native | |
| golden columbine | Aquilegia chrysantha | Native | |
| golden corydalis, scrambled eggs | Corydalis aurea | Native | |
| golden crownbeard | Verbesina encelioides | Native | |
| golden crownbeard | Verbesina encelioides ssp. exauriculata | Native | |
| golden desert snapdragon, golden desert-snapdragon | Mohavea breviflora | Native | |
| golden sedge, golden-fruit sedge | Carex aurea | Native | |
| golden suncup, yellow cups | Camissonia brevipes | Native | |
| goldenbush, rubber rabbitbrush | Ericameria nauseosa | Native | |
| goldenpea, mountain goldenbanner | Thermopsis montana var. montana | Native | |
| golden-tongue owl-clover, yellow owlclover, yellow owl’s-clover | Orthocarpus luteus | Native | |
| Goodding’s aster, Goodding’s goldenweed, Goodding’s tansyaster | Machaeranthera pinnatifida ssp. gooddingii var. gooddingii | Native | |
| Goodding’s aster, Goodding’s tansyaster | Machaeranthera pinnatifida ssp. gooddingii var. paradoxa | Native | |
| Goodding’s black willow, Goodding’s willow | Salix gooddingii | Native | |
| Gordon’s bladderpod | Lesquerella gordonii | Native | |
| Gordon’s bladderpod | Lesquerella gordonii var. gordonii | Native | |
| graceful buttercup | Ranunculus inamoenus | Native | |
| Grand Canyon campion, Grand Canyon catchfly | Silene rectiramea | Native | |
| Grand Canyon glowweed, Grand Canyon glow-weed | Hesperodoria scopulorum | Native | |
| Grand Canyon suncup | Camissonia confertiflora | Native | |
| grand collomia, largeflowered collomia | Collomia grandiflora | Native | |
| grass, hashish, hemp, marijuana, Mary Jane, pot | Cannabis sativa | Non-native | |
| grassland pricklypear, plains twistspine pricklypear, twistspine pricklypear | Opuntia macrorhiza | Native | |
| grassleaf pea, grassleaf peavine | Lathyrus graminifolius | Native | |
| grassy rockgoldenrod, rock goldenrod | Petradoria pumila | Native | |
| gravel cryptantha, gravel-bar catseye, gravelbar cryptantha | Cryptantha decipiens | Native | |
| gravel ghost, parachute plant, parachute-plant | Atrichoseris platyphylla | Native | |
| gravel milkvetch | Astragalus sabulonum | Native | |
| gray aster | Eurybia glauca | Native | |
| gray bindweed, Texas bindweed | Convolvulus equitans | Native | |
| gray hawksbeard, limestone hawksbeard | Crepis intermedia | Native | |
| gray horsebrush, spineless horsebrush | Tetradymia canescens | Native | |
| gray oak | Quercus grisea | Native | |
| gray thistle, wavyleaf thistle, wavy-leaf thistle | Cirsium undulatum | Native | |
| grayball sage, purple sage | Salvia dorrii | Native | |
| grayleaf condalia, graythorn, lotebush | Ziziphus obtusifolia var. canescens | Native | |
| Gray’s cudweed, slender cudweed | Gnaphalium exilifolium | Native | |
| Great Basin langloisia, moth langloisia | Langloisia setosissima | Native | |
| great bulrush, softstem bulrush, soft-stem bulrush | Schoenoplectus tabernaemontani | Native | |
| Great Divide clover, Intermountain clover | Trifolium andinum | Native | |
| great pricklypear, Mojave pricklypear | Opuntia phaeacantha var. major | Native | |
| greater creeping spearwort, spearwort buttercup | Ranunculus flammula | Native | |
| green antelopehorn milkweed, green comet milkweed, green milkweed | Asclepias viridiflora | Native | |
| green ephedra, green Mormon tea, Mormon tea | Ephedra viridis | Native | |
| green false nightshade, greenleaf five eyes, green-leaf five-eyes | Chamaesaracha coronopus | Native | |
| green groundsel, Mono groundsel, Mono ragwort | Senecio flaccidus var. monoensis | Native | |
| green muhly, marsh muhly | Muhlenbergia racemosa | Native | |
| green phlox | Phlox viridis ssp. longipes | Native | |
| green pigweed, slim amaranth, smooth amaranth, smooth pigweed | Amaranthus hybridus | Native | |
| green rubber rabbitbrush, rubber rabbitbrush | Ericameria nauseosa ssp. nauseosa var. glabrata | Native | |
| green tansymustard, pinnate tansy mustard, pinnate tansymustard, tansymustard, western tansymustard | Descurainia pinnata | Native | |
| Greene’s rabbitbrush | Chrysothamnus greenei | Native | |
| green-flowered shineleaf, green-flowered wintergreen, pale-green wintergreen | Pyrola chlorantha | Native | |
| greenleaf manzanita | Arctostaphylos patula | Native | |
| greenspot nightshade, green-spot nightshade | Solanum douglasii | Native | |
| greenstem paperflower | Psilostrophe sparsiflora | Native | |
| Grisebach bristlegrass, Grisebach’s bristlegrass | Setaria grisebachii | Native | |
| grizzlybear pricklypear | Opuntia erinacea var. ursina | Native | |
| grizzlybear pricklypear, Mohave pricklypear | Opuntia erinacea | Native | |
| grizzlybear pricklypear, porcupine pricklypear | Opuntia erinacea var. hystricina | Native | |
| ground-cherry nightshade, hairy nightshade, hoe nightshade | Solanum physalifolium | Non-native | |
| groundcherry, husk tomato, husk-tomato | Physalis pubescens | Native | |
| groundcover milkvetch | Astragalus humistratus var. humivagans | Native | |
| groundcover milkvetch | Astragalus humistratus var. sonorae | Native | |
| groundcover milkvetch, ground-cover milkvetch | Astragalus humistratus | Native | |
| Guadalupe catseye, Guadalupe cryptantha | Cryptantha maritima | Native | |
| gumleaf brickellbush, longleaf brickellbush | Brickellia longifolia var. multiflora | Native | |
| hackberry beardtongue | Penstemon subulatus | Native | |
| hairspine pricklypear, threadspine pricklypear | Opuntia polyacantha var. trichophora | Native | |
| hairy bowlesia, hoary bowlesia | Bowlesia incana | Native | |
| hairy clematis, sugarbowls | Clematis hirsutissima | Native | |
| hairy daisy, Navajo fleabane | Erigeron concinnus | Native | |
| hairy evening primrose, hairy eveningprimrose, hairy evening-primrose | Oenothera villosa ssp. strigosa | Native | |
| hairy false goldaster, hairy false goldenaster, hairy goldaster, hairy goldenaster | Heterotheca villosa | Native | |
| hairy false goldenaster | Heterotheca villosa var. foliosa | Native | |
| hairy false goldenaster | Heterotheca villosa var. minor | Native | |
| hairy false goldenaster, hairy false golden-aster | Heterotheca villosa var. villosa | Native | |
| hairy grama | Bouteloua hirsuta | Native | |
| hairy greenthread, low greenthread, Navajo tea, Navajo-tea, sand fringedpod | Thelesperma subnudum | Native | |
| hairy milkweed | Funastrum hirtellum | Native | |
| hairy pepperweed | Lepidium virginicum var. pubescens | Native | |
| hairy purslane speedwell, neckweed | Veronica peregrina ssp. xalapensis | Native | |
| hairy tridens, hairy woollygrass | Erioneuron pilosum | Native | |
| hairybeast brittlestem, hairybeast turtleback, hairy-beast turtleback | Psathyrotes pilifera | Native | |
| hairypod pepperweed, hairy-pod pepperwort, shaggyfruit pepperweed | Lepidium lasiocarpum var. lasiocarpum | Native | |
| halfshrub sundrop, whitest evening primrose, whitest eveningprimrose, whitest evening-primrose, white-stem evening-primrose | Oenothera albicaulis | Native | |
| handsome beardtongue, handsome penstemon | Penstemon lentus | Native | |
| hard fescue | Festuca trachyphylla | Non-native | |
| hardheads, Russian knapweed, Turestan thistle | Acroptilon repens | Non-native | |
| Harlequin bush, harlequinbush | Gaura hexandra ssp. gracilis | Native | |
| harlequinbush, Harlequin-bush, slender gaura | Gaura hexandra | Native | |
| Hart’s ragwort, Mogollon Mountain ragwort | Packera hartiana | Native | |
| Hartweg’s sundrops | Calylophus hartwegii | Native | |
| Hartweg’s twinevine | Funastrum cynanchoides ssp. heterophyllum | Native | |
| heartleaf arnica, heart-leaf leopardbane | Arnica cordifolia | Native | |
| heartleaf buttercup, heart-leaf buttercup | Ranunculus cardiophyllus | Native | |
| heartleaf twistflower | Streptanthus cordatus | Native | |
| heart’s-delight, prairie snowball, snowball sand verbena, sweet sand verbena | Abronia fragrans | Native | |
| Heermann’s buckwheat | Eriogonum heermannii var. subracemosum | Native | |
| Heermann’s buckwheat | Eriogonum heermannii var. subspinosum | Native | |
| Heermann’s buckwheat | Eriogonum heermannii var. sulcatum | Native | |
| hermit milkvetch | Astragalus eremiticus | Native | |
| Hesperostipa, needle and thread, needleandthread | Hesperostipa comata | Native | |
| hians goosefoot, pinyon goosefoot | Chenopodium hians | Native | |
| hiddenflower phacelia, hidden-flower scorpion-weed, limestone phacelia | Phacelia cryptantha | Native | |
| hierba de chivo, old-man’s-beard, virgins bower, virginsbower, virgin’s-bower, western white clematis | Clematis ligusticifolia | Native | |
| Hill’s lupine | Lupinus hillii | Native | |
| hillside verbena, MacDougal verbena | Verbena macdougalii | Native | |
| Himalaya blackberry, Himalayan blackberry | Rubus discolor | Non-native | |
| hoary aster, hoary goldenweed, hoary machaeranthera, hoary tansyaster, hoary tansy-aster, purple aster | Machaeranthera canescens | Common | Native |
| hoary fleabane | Erigeron canus | Native | |
| hoary groundsel | Packera werneriifolia | Native | |
| hoary myrtlecroton, western bernardia | Bernardia incana | Native | |
| hoary tansyaster | Machaeranthera canescens ssp. glabra var. glabra | Native | |
| hoary Townsend daisy, hoary townsend-daisy, hoary townsendia | Townsendia incana | Native | |
| hogbite, rush skeletonweed, skeletonweed | Chondrilla juncea | Non-native | |
| hollyhock | Alcea rosea | Occasional | Non-native |
| hollyleaf brickellbush, spearleaf brickellbush | Brickellia atractyloides | Native | |
| hollyleaf bursage, woolly bursage, woolly fruit bur ragweed, woolly fruit burr ragweed, wooly bursage | Ambrosia eriocentra | Native | |
| hollyleaf clover | Trifolium gymnocarpon | Native | |
| hollyleaf clover | Trifolium gymnocarpon ssp. gymnocarpon | Native | |
| hollyleaved barberry | Mahonia aquifolium | Non-native | |
| honey mesquite | Prosopis glandulosa | Native | |
| honeymat, woolly tidestromia | Tidestromia lanuginosa | Native | |
| hooded ladiestresses, hooded ladies’-tresses, hooded lady’s tresses | Spiranthes romanzoffiana | Native | |
| hooked buttercup, woodland buttercup | Ranunculus uncinatus | Native | |
| Hooker’s evening primrose, Hooker’s evening-primrose | Oenothera elata ssp. hookeri | Native | |
| Hooker’s evening primrose, Hooker’s eveningprimrose, Hooker’s evening-primrose, western eveningprimrose | Oenothera elata | Native | |
| hoptree, narrowleaf hoptree, pallid hoptree | Ptelea trifoliata ssp. pallida | Native | |
| horehound, white horehound | Marrubium vulgare | Non-native | |
| horned pondweed, horned poolmat, horned-pondweed | Zannichellia palustris | Native | |
| horned spurge, shorthorn spurge | Euphorbia brachycera | Native | |
| horse cinquefoil, woolly cinquefoil | Potentilla hippiana | Native | |
| horse mint, miners lettuce, plains beebalm, pony beebalm, spotted beebalm | Monarda pectinata | Native | |
| horsetail milkweed, poison milkweed, western whorled milkweed, whorled milkweed | Asclepias subverticillata | Native | |
| horsetail, scouring horsetail, scouringrush, scouringrush horsetail, tall scouring-rush, western scouringrush | Equisetum hyemale | Native | |
| horsetail, smooth horsetail, smooth scouringrush, smooth scouring-rush | Equisetum laevigatum | Native | |
| hot springs fimbry, hotsprings fimbry | Fimbristylis thermalis | Native | |
| Huachuca panic, tapered rosette grass, western panicgrass | Dichanthelium acuminatum var. fasciculatum | Native | |
| hybrid cloakfern, hybrid lipfern | Astrolepis integerrima | Native | |
| hybrid dogbane, intermediate dogbane | Apocynum X floribundum | Native | |
| hydra blazingstar, yellow comet stickleaf, yellowcomet | Mentzelia affinis | Native | |
| Idaho bentgrass, Idaho redtop | Agrostis idahoensis | Native | |
| Idaho fescue | Festuca idahoensis | Native | |
| imberis woodyaster | Xylorhiza tortifolia var. imberbis | Native | |
| incense cedar mistletoe, juniper mistletoe | Phoradendron juniperinum | Native | |
| Indian mallow, pelotazo, shrubby Indian mallow | Abutilon incanum | Native | |
| Indian ricegrass | Achnatherum hymenoides | Native | |
| Indian root, Watson’s dutchman’s pipe | Aristolochia watsonii | Native | |
| intermediate pepperweed, medium pepperweed | Lepidium virginicum var. medium | Native | |
| intermediate wheatgrass | Thinopyrum intermedium | Non-native | |
| iodinebush | Allenrolfea occidentalis | Native | |
| irisleaf rush | Juncus xiphioides | Native | |
| Italian ryegrass, perennial rye grass, perennial ryegrass | Lolium perenne | Non-native | |
| Ives’ phacelia, Ives’ scorpion-weed | Phacelia ivesiana | Native | |
| ivyleaf ground cherry, ivyleaf groundcherry | Physalis hederifolia | Native | |
| jackass clover, spectacle fruit | Wislizenia refracta | Native | |
| James’ buckwheat | Eriogonum jamesii var. flavescens | Native | |
| James’ buckwheat | Eriogonum jamesii var. undulatum | Native | |
| James’ buckwheat, James’ wildbuckwheat | Eriogonum jamesii | Native | |
| James’ catseye, James’ cryptantha | Cryptantha cinerea var. cinerea | Native | |
| James’ catseye, James’ cryptantha | Cryptantha cinerea var. jamesii | Native | |
| James’ nailwort, nailwort | Paronychia jamesii | Native | |
| Jane’s globemallow | Sphaeralcea janeae | Native | |
| Japanese brome, Japanese bromegrass, Japanese chess | Bromus japonicus | Non-native | |
| Japanese pagoda tree | Sophora japonica | Non-native | |
| Jersey cudweed, winged cudweed | Pseudognaphalium luteoalbum | Non-native | |
| Jim Hill mustard, tall hedge-mustard, tall mustard, tall tumblemustard, tumble mustard, tumblemustard, tumbleweed mustard | Sisymbrium altissimum | Non-native | |
| Johnson’s barrel cactus, Johnson’s fishhook cactus, pygmy barrel cactus | Sclerocactus johnsonii | Native | |
| Johnston’s knotweed | Polygonum douglasii ssp. johnstonii | Native | |
| jointed goat grass, jointed goatgrass, jointgrass | Aegilops cylindrica | Non-native | |
| jointed rush, jointleaf rush | Juncus articulatus | Native | |
| Jones’ false cloak fern, Jones’ lipfern | Argyrochosma jonesii | Native | |
| Jones pepperweed, Jones’ pepperweed | Lepidium montanum var. jonesii | Native | |
| Jones’ popcornflower, Mojave popcornflower | Plagiobothrys jonesii | Native | |
| Joshua tree | Yucca brevifolia | Native | |
| Joshua tree | Yucca brevifolia | Native | |
| Joshua tree, western Joshua tree | Yucca brevifolia var. brevifolia | Native | |
| junegrass, prairie Junegrass | Koeleria macrantha | Native | |
| juniper globemallow, slippery globemallow | Sphaeralcea digitata | Native | |
| Kaibab agave | Agave utahensis var. kaibabensis | Native | |
| Kaibab draba, Kaibab whitlowgrass | Draba asprella var. kaibabensis | Native | |
| Kaibab Indian paintbrush, Kaibab paintbrush, Kaibab Plateau Indian paintbrush | Castilleja kaibabensis | Native | |
| Kaibab Plateau beardtongue | Penstemon pseudoputus | Native | |
| Kaibab pussytoes | Antennaria rosulata | Native | |
| Kaibab suncup | Camissonia specuicola | Native | |
| Kaibab suncup | Camissonia specuicola ssp. hesperia | Native | |
| Kaibab suncup | Camissonia specuicola ssp. specuicola | Native | |
| Kaweah River phacelia, Kaweah river scorpion-weed | Phacelia egena | Native | |
| Kellogg’s knotweed | Polygonum polygaloides ssp. kelloggii | Native | |
| Kentucky bluegrass | Poa pratensis | Non-native | |
| King’s lupine | Lupinus kingii | Native | |
| King’s snapdragon, least snapdragon, least toad’s-mouth | Sairocarpus kingii | Native | |
| Knowlton’s hophornbeam | Ostrya knowltonii | Native | |
| lacepod mustard, sand fringepod, sand lacepod | Thysanocarpus curvipes | Native | |
| lacy tansyaster, lacy tansy-aster, spiny goldenweed | Machaeranthera pinnatifida ssp. pinnatifida var. pinnatifida | Native | |
| ladysthumb, lady’s-thumb, ladysthumb smartweed, spotted knotweed, spotted ladysthumb, spotted smartweed | Polygonum persicaria | Non-native | |
| Lake Powell fleabane, Navajo fleabane | Erigeron concinnus var. subglaber | Native | |
| Lambert’s crazyweed, Lambert’s locoweed, purple loco, purple locoweed, stemless loco, white woollyloco, whitepoint locoweed | Oxytropis lambertii | Native | |
| lamp rush, soft rush | Juncus effusus var. brunneus | Native | |
| lanceleaf cottonwood | Populus X acuminata | Native | |
| lanceleaf low rabbitbrush, lanceleaf rabbitbrush, yellow rabbitbrush | Chrysothamnus viscidiflorus ssp. lanceolatus | Native | |
| lanceleaf stonecrop, lance-leaf stonecrop, spearleaf stonecrop | Sedum lanceolatum | Native | |
| lanceleaf thorow wax | Bupleurum lancifolium | Non-native | |
| largebract spiderling, large-bract spiderling, Wright’s boerhavia | Boerhavia wrightii | Native | |
| largeflower hawksbeard, large-flower hawk’s-beard, western hawksbeard | Crepis occidentalis | Native | |
| largeflower wild hollyhock, large-flower wild hollyhock, wild hollyhock | Iliamna grandiflora | Native | |
| lavender calylophus, lavender sundrop, lavenderleaf eveningprimrose, lavenderleaf sundrops | Calylophus lavandulifolius | Native | |
| lavender thistle, New Mexico thistle, powderpuff thistle, Utah thistle | Cirsium neomexicanum | Native | |
| lax-flowered green orchid, northern green orchid | Platanthera hyperborea var. gracilis | Native | |
| leafy nama, purple mat, purplemat | Nama demissum | Native | |
| leafy pondweed | Potamogeton foliosus | Native | |
| least duckweed | Lemna minuta | Native | |
| Leconte’s barrel cactus, redspine barrel cactus | Ferocactus cylindraceus var. lecontei | Native | |
| lemon verbena, mintbush lippia, Wright’s aloysia, Wright’s beebrush, Wright’s lippia | Aloysia wrightii | Native | |
| leopard lily, spotted fritillary, spotted missionbells | Fritillaria atropurpurea | Native | |
| Leopold rush, Leopold’s rush | Juncus acutus ssp. leopoldii | Native | |
| lepor barley, leporinum barley | Hordeum murinum ssp. leporinum | Non-native | |
| lesser yellowthroat gilia | Gilia flavocincta | Native | |
| Letterman needlegrass, Letterman’s needlegrass | Achnatherum lettermanii | Native | |
| Lewis’ flax, prairie flax | Linum lewisii var. lewisii | Native | |
| Liddon sedge, Liddon’s sedge | Carex petasata | Native | |
| limestone bedstraw | Galium proliferum | Native | |
| limestone phacelia, limestone scorpionweed, limestone scorpion-weed, purplebell phacelia | Phacelia affinis | Native | |
| Lindley’s silverpuffs | Uropappus lindleyi | Native | |
| little barley, little wildbarley | Hordeum pusillum | Native | |
| little bluestem | Schizachyrium scoparium | Native | |
| little bluestem | Schizachyrium scoparium var. scoparium | Native | |
| little desert trumpet, little deserttrumpet | Eriogonum trichopes | Native | |
| little redstem monkeyflower, red monkeyflower, redstem monkey-flower | Mimulus rubellus | Native | |
| littleleaf alumroot | Heuchera parvifolia var. flavescens | Native | |
| littleleaf matelea, small-leaf anglepod, spearleaf | Matelea parvifolia | Native | |
| littleleaf mock orange, littleleaf mockorange | Philadelphus microphyllus | Native | |
| littleleaf mountain-mahogany | Cercocarpus intricatus | Native | |
| little-leaf pussytoes, Rocky Mountain pussytoes, small leaf pussytoes, smalleaf pussytoes, small-leaf pussytoes | Antennaria parvifolia | Native | |
| littleleaf ratany, range ratany | Krameria erecta | Native | |
| littlepod false flax, little-pod false flax, littlepod falseflax, littleseed falseflax, small fruited falseflax, smallseed falseflax | Camelina microcarpa | Non-native | |
| littleseed muhly | Muhlenbergia microsperma | Native | |
| lobed daisy, lobed fleabane | Erigeron lobatus | Native | |
| lobeleaf groundsel | Packera multilobata | Native | |
| London rocket, rocketmustard | Sisymbrium irio | Non-native | |
| long leaf brickellbush, longleaf brickellbush | Brickellia longifolia | Native | |
| long valley tumble-mustard, Long Valley tumblemustard | Thelypodiopsis ambigua | Native | |
| longbeak fiddle mustard, longbeak streptanthella | Streptanthella longirostris | Native | |
| longcapsule suncup, long-capsule suncup, willowherb suncup | Camissonia chamaenerioides | Native | |
| longleaf false goldeneye | Heliomeris longifolia var. longifolia | Native | |
| longleaf false goldeneye, longleaf falsegoldeneye, longleaf falsegoldeneyes | Heliomeris longifolia | Native | |
| longleaf phlox | Phlox longifolia | Native | |
| longleaf phlox | Phlox longifolia ssp. brevifolia | Native | |
| longstalk clover, long-stalk clover | Trifolium longipes | Native | |
| long-stalk clover, pygmy clover | Trifolium longipes ssp. pygmaeum | Native | |
| longstem evening primrose, longstem eveningprimrose, longstem evening-primrose | Oenothera longissima | Native | |
| long-style rush, long-styled rush | Juncus longistylis | Native | |
| long-tube evening primrose, long-tube evening-primrose, yellow evening primrose, yellow eveningprimrose, yellow evening-primrose | Oenothera flava | Native | |
| Loomis’ thimblehead | Hymenothrix loomisii | Native | |
| Louisiana broomrape, Louisiana broom-rape, sand broomrape | Orobanche ludoviciana ssp. ludoviciana | Native | |
| low larkspur, Nuttall’s larkspur, twolobe larkspur, two-lobe larkspur | Delphinium nuttallianum | Native | |
| low lupine, rusty lupine, small lupine | Lupinus pusillus | Native | |
| MacDougal’s aletes, MacDougal’s Indian parsley, MacDougal’s Indian-parsley | Aletes macdougalii | Native | |
| Macdougal’s bluebells | Mertensia macdougalii | Native | |
| MacDougal’s groundsel, MacDougal’s ragwort | Senecio eremophilus var. macdougalii | Native | |
| MacDougal’s Indian parsley | Aletes macdougalii ssp. macdougalii | Native | |
| MacDougal’s yellowtops | Flaveria macdougalii | Native | |
| Macoun’s cudweed | Pseudognaphalium macounii | Native | |
| male fern, male woodfern, malefern | Dryopteris filix-mas | Native | |
| Malta starthistle, Maltese star thistle, Maltese star-thistle, Napa thistle, spotted knapweed, tocalote | Centaurea melitensis | Rare | Non-native |
| Mancos columbine | Aquilegia micrantha | Native | |
| manybranched gilia, manybranched ipomopsis, sprawling skyrocket | Ipomopsis polycladon | Native | |
| manyflower false threadleaf, many-flower false threadleaf | Schkuhria multiflora | Native | |
| many-flower gilia, manyflowered gilia, manyflowered ipomopsis | Ipomopsis multiflora | Native | |
| manyflower stickseed, manyflowered stickseed, showy stickseed | Hackelia floribunda | Native | |
| manyflowered gromwell, manyflowered stoneseed, purple pucoon | Lithospermum multiflorum | Native | |
| manyfruit spurge, smallseed sandmat, small-seed sandmat | Chamaesyce polycarpa | Native | |
| Marble Canyon spurge, Ross spurge | Euphorbia aaron-rossii | Native | |
| mariola | Parthenium incanum | Native | |
| marsh fleabane, sweet scent, sweetscent | Pluchea odorata var. odorata | Native | |
| marsh meadow-foxtail, water foxtail | Alopecurus geniculatus | Non-native | |
| Marston’s foxtail cactus | Escobaria missouriensis var. marstonii | Native | |
| Martin’s ceanothus | Ceanothus martinii | Native | |
| mat grama, matted grama | Bouteloua simplex | Native | |
| mat muhly, soft-leaf muhly | Muhlenbergia richardsonis | Native | |
| mat penstemon, tufted penstemon | Penstemon caespitosus var. desertipicti | Native | |
| mat phlox, spreading phlox | Phlox diffusa ssp. subcarinata | Native | |
| mat rockspirea, rockspirea, tufted rockmat | Petrophyton caespitosum | Native | |
| mat rockspirea, Rocky Mountain rockspirea | Petrophyton caespitosum var. elatius | Native | |
| matted poison milkvetch, mattedmilkvetch, Torrey’s milkvetch | Astragalus calycosus | Native | |
| meadow barley | Hordeum brachyantherum | Native | |
| meadow beardtongue, Rydberg’s penstemon | Penstemon rydbergii | Native | |
| meadow fescue, meadow ryegrass | Lolium pratense | Non-native | |
| meadow thistle | Cirsium scariosum | Native | |
| mealy goosefoot | Chenopodium incanum var. elatum | Native | |
| mealy goosefoot, nealy goosefoot | Chenopodium incanum | Native | |
| Mediterannean barley, Mediterranean barley | Hordeum marinum ssp. gussonianum | Non-native | |
| Menzies’ campion, white catchfly | Silene menziesii | Native | |
| Mertens’ rush | Juncus mertensianus | Native | |
| mesa dropseed | Sporobolus flexuosus | Native | |
| mesa muhly, slimflower muhly | Muhlenbergia tenuifolia | Native | |
| mesa pepperwort | Lepidium alyssoides var. junceum | Native | |
| mesquite mistletoe | Phoradendron californicum | Native | |
| Mexican cliffrose | Purshia mexicana | Native | |
| Mexican dock, trianglevalve dock, willow dock | Rumex salicifolius var. mexicanus | Native | |
| Mexican lovegrass | Eragrostis mexicana | Native | |
| Mexican manzanita, pointleaf manzanita | Arctostaphylos pungens | Native | |
| Mexican panicgrass, roughstalk witchgrass, woodland panic | Panicum hirticaule | Native | |
| Mexican rush | Juncus mexicanus | Native | |
| Mexican sprangletop | Leptochloa fusca ssp. uninervia | Native | |
| Mexican tea | Chenopodium ambrosioides var. ambrosioides | Non-native | |
| Mexican tea, Mexican-tea | Chenopodium ambrosioides | Non-native | |
| mid bladderpod, Santa Fe bladderpod | Lesquerella intermedia | Native | |
| milk kelloggia, milky kelloggia | Kelloggia galioides | Native | |
| miner’s lettuce, minerslettuce | Claytonia perfoliata | Native | |
| miniature monkey-flower, Suksdorf’s monkeyflower | Mimulus suksdorfii | Native | |
| Missouri goldenrod, prairie goldenrod, Tolmie’s goldenrod | Solidago missouriensis | Native | |
| Moapa bladderpod | Lesquerella tenella | Native | |
| Mohave aster, Torrey’s desert dandelion, Torrey’s desertdandelion | Malacothrix torreyi | Native | |
| Mohave brickellbush, Mojave brickellbush, narrowleaf brickellbush | Brickellia oblongifolia | Native | |
| Mohave desertrue, turpentine broom, turpentinebroom | Thamnosma montana | Native | |
| Mohave groundsel, Mojave ragwort | Senecio mohavensis | Native | |
| Mohave hedgehog cactus, Mojave kingcup cactus | Echinocereus triglochidiatus var. mojavensis | Native | |
| Mojave aster, Mojave woodyaster | Xylorhiza tortifolia | Native | |
| Mojave biscuitroot, Mojave desertparsley, Mojave desert-parsley | Lomatium mohavense | Native | |
| Mojave dalea, Mojave indigobush, Mojave smokebush | Psorothamnus arborescens | Native | |
| Mojave indigobush, Mojave smokebush | Psorothamnus arborescens var. pubescens | Native | |
| Mojave prickly poppy, Mojave pricklypoppy | Argemone corymbosa | Native | |
| Mojave prickly poppy, Mojave pricklypoppy | Argemone corymbosa ssp. arenicola | Native | |
| Mojave sandwort, shrubby sandwort | Arenaria macradenia | Native | |
| Mojave spurge | Euphorbia incisa | Native | |
| Mokiak milkvetch | Astragalus mokiacensis | Native | |
| Montana pepperweed, mountain pepperweed, mountain pepperwort | Lepidium montanum | Native | |
| mound saltbush, silver saltbush | Atriplex obovata | Native | |
| mountain brickellbush, tasselflower brickellbush, tasselflower brickellia | Brickellia grandiflora | Native | |
| mountain brome | Bromus marginatus | Native | |
| mountain camphorweed, rockyscree false goldenaster, rockyscree falsegoldenaster | Heterotheca fulcrata | Native | |
| mountain deathcamas | Zigadenus elegans | Native | |
| mountain draba, mountain whitlowgrass | Draba rectifructa | Native | |
| mountain fringepod, narrowleaf lacepod, Santa Cruz Island fringepod | Thysanocarpus laciniatus | Native | |
| mountain heath, pink mountainheath, red mountainheath | Phyllodoce empetriformis | Native | |
| mountain mock thelypody | Pennellia micrantha | Native | |
| mountain muhly | Muhlenbergia montana | Native | |
| mountain pepperweed, smooth pepperweed | Lepidium montanum var. glabrum | Native | |
| mountain rush | Juncus balticus var. montanus | Native | |
| mountain snowberry, whortleleaf snowberry | Symphoricarpos oreophilus | Native | |
| mountain spurge | Euphorbia chamaesula | Native | |
| mountain tansy mustard, mountain tansymustard | Descurainia incana ssp. incisa | Native | |
| mountain-meadow cinquefoil, varileaf cinquefoil | Potentilla diversifolia | Native | |
| Mt. Dellenbaugh sandwort | Arenaria aberrans | Native | |
| muchbranched groundsmoke, pinyon groundsmoke | Gayophytum ramosissimum | Native | |
| mulberry, white mulberry | Morus alba | Non-native | |
| mule-fat, mule’s fat, seep willow, seepwillow, seepwillow baccharis | Baccharis salicifolia | Native | |
| Munz’s bedstraw | Galium munzii | Native | |
| mutton grass, muttongrass | Poa fendleriana | Native | |
| nakedstem sunray | Enceliopsis nudicaulis | Native | |
| narrow leaf brickellbush, narrowleaf brickellbush | Brickellia oblongifolia var. linifolia | Native | |
| narrow phacelia, narrow scorpion-weed | Phacelia filiformis | Native | |
| narrowleaf bean, slimleaf bean | Phaseolus angustissimus | Native | |
| narrowleaf burr reed, narrowleaf burreed, narrowleaf bur-reed | Sparganium angustifolium | Native | |
| narrowleaf cattail, narrow-leaf cat-tail | Typha angustifolia | Non-native | |
| narrowleaf cottonwood | Populus angustifolia | Native | |
| narrowleaf goosefoot, narrowleaf lambsquarters, narrowleaved goosefoot, slimleaf goosefoot, slimleaf lambsquarters | Chenopodium leptophyllum | Native | |
| narrowleaf mountaintrumpet, narrow-leaf mountain-trumpet, slenderleaf collomia, tiny trumpet | Collomia linearis | Native | |
| narrowleaf suncup, narrow-leaf suncup | Camissonia refracta | Native | |
| narrowleaf wirelettuce | Stephanomeria minor var. minor | Native | |
| narrowleaf yucca | Yucca angustissima | Native | |
| narrowstem catseye, narrowstem cryptantha, narrowstem pick-me-not | Cryptantha gracilis | Native | |
| natalgrass, roundleaf phacelia, round-leaf scorpion-weed | Phacelia rotundifolia | Native | |
| Navajo cinquefoil | Potentilla subviscosa | Native | |
| Navajo saltbush | Atriplex navajoensis | Native | |
| Nebraska sedge | Carex nebrascensis | Native | |
| neckweed, purslane speedwell | Veronica peregrina | Native | |
| nectarine | Prunus persica var. nucipersica | Non-native | |
| needle and thread, needleandthread | Hesperostipa comata ssp. comata | Native | |
| needle grama | Bouteloua aristidoides | Native | |
| needle spikerush, needle spikesedge | Eleocharis acicularis | Native | |
| netleaf hackberry | Celtis laevigata var. reticulata | Native | |
| netseed lambsquarters, pigseed goosefoot, pitseed goosefoot, pit-seed goosefoot | Chenopodium berlandieri | Native | |
| nettleleaf goosefoot, nettle-leaf goosefoot | Chenopodium murale | Non-native | |
| Nevada biscuitroot, Nevada desert-parsley | Lomatium nevadense | Native | |
| Nevada catseye, Nevada cryptantha | Cryptantha nevadensis | Native | |
| Nevada ephedra, Nevada jointfir, Nevada Mormon tea | Ephedra nevadensis | Native | |
| Nevada goldeneye, Nevada goldeneyes | Heliomeris multiflora var. nevadensis | Native | |
| Nevada greasebush, spiny greasebush | Glossopetalon spinescens var. aridum | Native | |
| Nevada onion | Allium nevadense | Native | |
| Nevada rush, Sierra rush | Juncus nevadensis | Native | |
| New Mexico checkermallow, salt spring checkerbloom | Sidalcea neomexicana | Native | |
| New Mexico cliff fern | Woodsia neomexicana | Native | |
| New Mexico feathergrass, New Mexico needlegrass | Hesperostipa neomexicana | Native | |
| New Mexico locust | Robinia neomexicana | Native | |
| New Mexico maple | Acer glabrum var. neomexicanum | Native | |
| New Mexico muhly | Muhlenbergia pauciflora | Native | |
| New Mexico raspberry | Rubus neomexicanus | Native | |
| New Mexico yellow flax | Linum neomexicanum | Native | |
| Newberry’s milkvetch | Astragalus newberryi | Native | |
| Newberry’s twinpod | Physaria newberryi | Native | |
| night-flowering catchfly, nightflowering silene, sticky cockle | Silene noctiflora | Non-native | |
| nodding brome, nodding bromegrass | Bromus anomalus | Native | |
| nodding buckwheat, nodding eriogonum, nodding wild buckwheat | Eriogonum cernuum | Native | |
| northern bog violet, wanderer violet | Viola nephrophylla | Native | |
| northern catalpa | Catalpa speciosa | Native | |
| northern mannagrass, small floating manna grass, small floating mannagrass | Glyceria borealis | Native | |
| northern rockjasmine, pygmyflower rockjasmine, pygmy-flower rock-jasmine | Androsace septentrionalis | Native | |
| northern water plantain, northern water-plantain | Alisma triviale | Native | |
| Norwegian cinquefoil | Potentilla norvegica | Native | |
| nut pine, one-leaf pine, singleleaf pinyon | Pinus monophylla | Native | |
| Nuttall milkvetch, smallflowered milkvetch | Astragalus nuttallianus | Native | |
| Oak Creek ragwort | Packera quercetorum | Native | |
| obovate buckthorn, ovateleaf buckthorn | Frangula betulifolia ssp. obovata | Native | |
| ocotillo | Fouquieria splendens | Native | |
| oleaster, Russian olive, Russian-olive, Trebizond-date | Elaeagnus angustifolia | Non-native | |
| olive | Olea europaea | Non-native | |
| oneflower helianthella | Helianthella uniflora | Native | |
| oneseed juniper | Juniperus monosperma | Native | |
| one-sided wintergreen, sidebells wintergreen | Orthilia secunda | Native | |
| orange agoseris, orange-flowered false-dandelion | Agoseris aurantiaca | Native | |
| orange hawkweed | Hieracium aurantiacum | Non-native | |
| Oregon buttercup | Ranunculus oreogenes | Native | |
| Oregon cliff fern, Oregon woodsia, western cliff fern | Woodsia oregana | Native | |
| Osterhout lupine, Osterhout’s lupine | Lupinus hillii var. osterhoutianus | Native | |
| ovalhead sedge, smallwing sedge | Carex microptera | Native | |
| ovalpurse, prostrate hutchinsia | Hutchinsia procumbens | Non-native | |
| ovate spikerush, ovoid spikerush, ovoid spike-rush | Eleocharis ovata | Native | |
| oxeye daisy, ox-eye daisy, oxeyedaisy, oxeye-daisy | Leucanthemum vulgare | Non-native | |
| Pacific willow | Salix lucida ssp. lasiandra | Native | |
| Pagosa ipomopsis, Pagosa skyrocket | Ipomopsis polyantha | Native | |
| painted desert milkvetch | Astragalus sophoroides | Native | |
| pale agoseris, pale dandelion, prairie dandelion | Agoseris glauca | Native | |
| pale agoseris, pale goat-chicory | Agoseris glauca var. dasycephala | Native | |
| pale desert-thorn, pale wolfberry | Lycium pallidum | Native | |
| pale dock, smooth dock | Rumex altissimus | Native | |
| pale evening primrose, pale eveningprimrose, pale evening-primrose | Oenothera pallida | Native | |
| pale evening primrose, pale eveningprimrose, pale evening-primrose | Oenothera pallida ssp. pallida | Native | |
| pale evening primrose, pale eveningprimrose, pale evening-primrose | Oenothera pallida ssp. runcinata | Native | |
| paleyellow suncup, pale-yellow suncup | Camissonia pallida | Native | |
| pallid hoptree | Ptelea trifoliata ssp. pallida var. pallida | Native | |
| Palmer’s buckwheat, Palmer’s wild buckwheat | Eriogonum palmerianum | Native | |
| Palmer’s penstemon | Penstemon palmeri | Native | |
| Palmer’s phacelia, Palmer’s scorpionweed, Palmer’s scorpion-weed | Phacelia palmeri | Native | |
| pampas grass, silver pampas grass, Uruguayan pampas grass, Uruguayan pampasgrass | Cortaderia selloana | Non-native | |
| paradise apple | Malus pumila | Non-native | |
| Parish spikerush, Parish’s spikerush | Eleocharis parishii | Native | |
| Parish threeawn, Parish’s threeawn | Aristida purpurea var. parishii | Native | |
| Parish’s biscuitroot | Lomatium nevadense var. parishii | Native | |
| Parish’s goldeneye | Viguiera parishii | Native | |
| Parish’s snowberry | Symphoricarpos rotundifolius var. parishii | Native | |
| Parish’s yampah, Sierra Queen Anne’s lace | Perideridia parishii | Native | |
| Parry agave, Parry’s agave | Agave parryi | Native | |
| Parry’s beargrass, Parry’s sacahuista | Nolina parryi | Native | |
| Parry’s bellflower, Parry’s harebell | Campanula parryi | Native | |
| Parry’s buckwheat, Parry’s wild buckwheat | Eriogonum brachypodum | Native | |
| Parry’s gentian | Gentiana parryi | Native | |
| Parry’s goldenrod | Oreochrysum parryi | Native | |
| Parry’s lip fern, Parry’s lipfern | Cheilanthes parryi | Native | |
| Parry’s rabbitbrush | Ericameria parryi var. nevadensis | Native | |
| Parry’s sandpaper plant, Parry’s sandpaperplant | Petalonyx parryi | Native | |
| Parry’s wire lettuce, Parry’s wirelettuce | Stephanomeria parryi | Native | |
| peach | Prunus persica | Non-native | |
| pebble pincushion, Peeble pincushion | Chaenactis carphoclinia var. carphoclinia | Native | |
| pedicellate phacelia, pedicellate scorpion-weed | Phacelia pedicellata | Native | |
| Pennsylvania pellitory | Parietaria pensylvanica | Native | |
| pennyroyal leaf phacelia, pennyroyal-leaf scorpion-weed | Phacelia glechomifolia | Native | |
| perennial rockcress | Arabis perennans | Native | |
| perennial sowthistle, prickly sow thistle, prickly sowthistle, spiny sowthistle, spiny-leaf sow-thistle | Sonchus asper | Non-native | |
| Persian knotweed, silversheath knotweed, silver-sheath knotweed | Polygonum argyrocoleon | Non-native | |
| pigweed, pigweed amaranth, prostrate pigweed, tumble pigweed, tumbleweed, white pigweed | Amaranthus albus | Non-native | |
| pillar false gumweed | Vanclevea stylosa | Native | |
| pine dropseed | Blepharoneuron tricholepis | Native | |
| pineland dwarf mistletoe, ponderosa pine dwarf mistletoe | Arceuthobium vaginatum ssp. cryptopodum | Native | |
| pinewoods clover, woods clover | Trifolium pinetorum | Native | |
| pineywoods geranium, purple cluster geranium, tufted geranium | Geranium caespitosum | Native | |
| pink alumroot | Heuchera rubescens | Native | |
| pink alumroot, versicolor alumroot | Heuchera rubescens var. versicolor | Native | |
| pink funnel lily, pink funnellily, smallflower androstephium | Androstephium breviflorum | Native | |
| pink microsteris, slender phlox | Phlox gracilis ssp. gracilis | Native | |
| pink pincushion cactus, spinystar, spinystar cactus | Escobaria vivipara var. vivipara | Native | |
| pinkflower hedgehog cactus, strawberry cactus | Echinocereus fendleri var. fasciculatus | Native | |
| pinyon dwarf mistletoe | Arceuthobium divaricatum | Native | |
| pipsissewa | Chimaphila umbellata ssp. acuta | Native | |
| pipsissewa, prince’s pine | Chimaphila umbellata | Native | |
| plains blackfoot, plains blackfoot daisy | Melampodium leucanthum | Native | |
| plains bluegrass | Poa arida | Native | |
| plains bristlegrass | Setaria vulpiseta | Native | |
| plains fleabane | Erigeron modestus | Native | |
| plains pricklypear | Opuntia polyacantha | Native | |
| plains wallflower, prairie rocket, sand dune wallflower, western wallflower | Erysimum capitatum var. capitatum | Native | |
| plains zinnia, Rocky Mountain zinnia, Texas zinnia | Zinnia grandiflora | Native | |
| pleated gentian, Rocky Mountain gentian | Gentiana affinis | Native | |
| poison ivy, western poison ivy | Toxicodendron rydbergii | Native | |
| pomegranate | Punica granatum | Non-native | |
| Porter’s licoriceroot, Porter’s licorice-root, Porter’s ligusticum, Porter’s wild lovage | Ligusticum porteri | Native | |
| poverty rush | Juncus tenuis var. tenuis | Native | |
| Powell’s amaranth, Powell’s pigweed | Amaranthus powellii | Native | |
| prairie coneflower, redspike Mexican hat, upright prairie coneflower | Ratibida columnifera | Native | |
| prairie sunflower, showy sunflower | Helianthus petiolaris | Native | |
| Preuss’ milkvetch | Astragalus preussii | Native | |
| Preuss milkvetch, Preuss’ milkvetch | Astragalus preussii var. preussii | Native | |
| prickleaf dogweed, pricklyleaf dogweed, Texas dogweed | Thymophylla acerosa | Native | |
| prickly Russian thistle, tumbleweed | Salsola tragus | Non-native | |
| primrose monkeyflower, yellow creeping monkey-flower | Mimulus primuloides | Native | |
| Pringle’s catchfly, simple campion | Silene scouleri ssp. pringlei | Native | |
| prostrate desert phlox, prostrate mountain phlox | Phlox austromontana ssp. prostrata | Native | |
| prostrate knotweed, yard knotweed | Polygonum aviculare | Non-native | |
| prostrate spurge, red-gland spurge, squaw sandmat | Chamaesyce melanadenia | Native | |
| pubescent wheatgrass, western wheatgrass | Pascopyrum smithii | Native | |
| pullup muhly | Muhlenbergia filiformis | Native | |
| purple 3-awn, purple threeawn, purple three-awn, red threeawn | Aristida purpurea | Native | |
| purple bird’sbeak, purple bird’s-beak | Cordylanthus parviflorus | Native | |
| purple bladderpod, rose bladderpod | Lesquerella purpurea | Native | |
| purple cliffbrake, purple-stem cliffbrake, purple-stem cliff-brake | Pellaea atropurpurea | Native | |
| purple love grass, purple lovegrass, spreading lovegrass, tufted lovegrass | Eragrostis pectinacea | Native | |
| purple love grass, Purple lovegrass, spreading lovegrass, tufted lovegrass | Eragrostis pectinacea var. pectinacea | Native | |
| purple owlclover, purplewhite owlclover, purplewhite owl’s-clover | Orthocarpus purpureoalbus | Native | |
| purpledisk helianthella, small-head dwarf-sunflower | Helianthella microcephala | Native | |
| purpleroot pick-me-not, redroot catseye, redroot cryptantha | Cryptantha micrantha | Native | |
| Purpus’ tumblemustard, Purpus’ tumble-mustard | Thelypodiopsis purpusii | Native | |
| Pursh’s wallflower | Erysimum capitatum var. purshii | Native | |
| pygmy bluet | Houstonia wrightii | Native | |
| pygmy cedar, pygmycedar, Schott’s pygmycedar | Peucephyllum schottii | Native | |
| pygmy fameflower, pygmy talinum | Talinum brevifolium | Native | |
| pygmy goldenpoppy, pygmy poppy | Eschscholzia minutiflora | Native | |
| pygmyflower rockjasmine | Androsace septentrionalis ssp. glandulosa | Native | |
| pygmyflower rockjasmine, pygmy-flower rock-jasmine | Androsace septentrionalis ssp. puberulenta | Native | |
| quackgrass | Elymus repens | Non-native | |
| quail plant, salt heliotrope, seaside heliotrope | Heliotropium curassavicum | Native | |
| quaking aspen | Populus tremuloides | Native | |
| radishroot woodsorrel | Oxalis albicans | Native | |
| radishroot woodsorrel | Oxalis albicans ssp. pilosa | Native | |
| ragged rockflower | Crossosoma bigelovii var. bigelovii | Native | |
| ragleaf bahia | Bahia dissecta | Native | |
| ragweed, weakleaf bur ragweed, weakleaf burr ragweed | Ambrosia confertiflora | Native | |
| Ranenna grass, ravennagrass | Saccharum ravennae | Non-native | |
| ratear coldenia, woody crinklemat | Tiquilia canescens | Native | |
| rattlesnake plantain, western rattlesnake plantain | Goodyera oblongifolia | Native | |
| ravine fescue | Festuca sororia | Native | |
| ravine fescue, red fescue | Festuca rubra | Native | |
| rayless aster, rayless tansyaster, rayless tansy-aster | Machaeranthera grindelioides | Native | |
| rayless aster, rayless tansyaster, rayless tansy-aster | Machaeranthera grindelioides var. grindelioides | Native | |
| rayless goldenhead | Acamptopappus sphaerocephalus | Native | |
| rayless goldenrod, southern goldenbush, southern jimmyweed | Isocoma pluriflora | Native | |
| recurved milkvetch | Astragalus recurvus | Native | |
| red barberry, red mahonia | Mahonia haematocarpa | Native | |
| red goosefoot | Chenopodium rubrum | Native | |
| red grama | Bouteloua trifida | Native | |
| red triangles, spring flower | Centrostegia thurberi | Native | |
| red willow | Salix laevigata | Native | |
| redosier dogwood, Siberian dogwood, Tatarian dogwood | Cornus sericea ssp. sericea | Native | |
| redosier, redosier dogwood | Cornus sericea | Native | |
| redroot buckwheat | Eriogonum racemosum | Native | |
| red-root flat sedge, redroot flatsedge, redroot nutgrass | Cyperus erythrorhizos | Native | |
| redscale saltbush, redscale saltweed, tumbling orache, tumbling saltweed | Atriplex rosea | Non-native | |
| red-seed dandelion, rock dandelion | Taraxacum laevigatum | Non-native | |
| reed canary grass, reed canarygrass | Phalaris arundinacea | Native | |
| Reeves’ bladderfern | Cystopteris reevesiana | Native | |
| repand wallflower, spreading wallflower | Erysimum repandum | Non-native | |
| rescue brome, rescue grass, rescuegras, rescuegrass | Bromus catharticus | Non-native | |
| Richardson’s geranium | Geranium richardsonii | Native | |
| rillita pellitory | Parietaria hespera | Native | |
| Rincon Indian paintbrush, Rincon Mountain Indian paintbrush | Castilleja austromontana | Native | |
| ringstem, southwestern ringstem | Anulocaulis leiosolenus | Native | |
| Rio Fronteras milkvetch, smallflowered milkvetch | Astragalus nuttallianus var. austrinus | Native | |
| Rio Grande saddlebush | Mortonia scabrella | Native | |
| ripgut brome | Bromus diandrus | Non-native | |
| rock gilia, rock gily-flower, Rocky Mountain gilia | Gilia scopulorum | Native | |
| rock phacelia, stonecrop phacelia, stonecrop scorpion-weed | Phacelia saxicola | Native | |
| rock springparsley, rockloving desert parsley, rockloving wavewing | Pteryxia petraea | Native | |
| rock whitefeather, rock-whitefeather | Ivesia arizonica | Native | |
| Rocky Mountain goosefoot | Chenopodium salinum | Native | |
| Rocky Mountain hemlockparsley, Rocky Mountain hemlock-parsley | Conioselinum scopulorum | Non-native | |
| Rocky Mountain iris, western blue flag, wild iris, wildiris | Iris missouriensis | Native | |
| Rocky Mountain juniper | Juniperus scopulorum | Native | |
| Rocky Mountain maple | Acer glabrum var. diffusum | Native | |
| Rocky Mountain rush | Juncus saximontanus | Native | |
| Rocky Mountain willowherb, Rocky Mountain willowweed | Epilobium saximontanum | Native | |
| romero, rosemary | Rosmarinus officinalis | Non-native | |
| rooted spikerush | Eleocharis radicans | Native | |
| rose heath, smallflower aster | Chaetopappa ericoides | Native | |
| Ross sedge, Ross’ sedge, Ross’s sedge, shortstemmed sedge | Carex rossii | Native | |
| rosy gilia | Gilia sinuata | Native | |
| rosy pussytoes | Antennaria rosea ssp. arida | Native | |
| Rothrock’s thistle | Cirsium rothrockii | Native | |
| rough bent, rough bentgrass, ticklegrass | Agrostis scabra | Native | |
| rough brickellbush | Brickellia microphylla var. scabra | Native | |
| rough draba, rough whitlowgrass | Draba asprella | Native | |
| rough draba, rough whitlowgrass | Draba asprella var. stelligera | Native | |
| rough menodora | Menodora scabra | Native | |
| rough tridens, slim tridens | Tridens muticus var. elongatus | Native | |
| roughfruit fairybells, rough-fruit fairybells, wartberry fairybells | Disporum trachycarpum | Native | |
| roughseed catseye, rough-seed catseye, roughseed cryptantha | Cryptantha flavoculata | Native | |
| roundleaf buffaloberry | Shepherdia rotundifolia | Native | |
| rubber rabbitbrush | Ericameria nauseosa ssp. nauseosa var. nauseosa | Native | |
| Rusby’s blazingstar, Rusby’s stickleaf | Mentzelia rusbyi | Native | |
| rush lemonweed | Psoralidium junceum | Native | |
| Rydberg’s thistle | Cirsium rydbergii | Native | |
| sacred datura, sacred thornapple, sacred thorn-apple | Datura wrightii | Native | |
| salina wildrye, saline wildrye | Leymus salinus ssp. salinus | Native | |
| salt cedar, saltcedar, tamarisk, tamarix | Tamarix ramosissima | Common | Non-native |
| salt sandspurry | Spergularia salina | Non-native | |
| San Felipe dogweed, San Felipe dyssodia | Adenophyllum porophylloides | Native | |
| sand bittercress, smallflowered bittercress | Cardamine parviflora | Native | |
| sand bluestem | Andropogon hallii | Native | |
| sand buckwheat | Eriogonum leptocladon var. ramosissimum | Native | |
| sand dropseed | Sporobolus cryptandrus | Native | |
| sand gilia, sand gily-flower, slender gilia | Gilia leptomeria | Native | |
| sand reverchonia | Reverchonia arenaria | Native | |
| sand sagebrush, sandhill sage, silvery wormwood | Artemisia filifolia | Native | |
| sandhill muhly | Muhlenbergia pungens | Native | |
| scapose milkvetch, Torrey milkvetch, Torrey’s milkvetch | Astragalus calycosus var. scaposus | Native | |
| scarlet beeblossom, scarlet gaura, Scarlet guara | Gaura coccinea | Native | |
| scarlet creeper, scarletcreeper | Ipomoea hederifolia | Native | |
| scarlet spiderling | Boerhavia coccinea | Native | |
| scented beardtongue, scented penstemon | Penstemon palmeri var. eglandulosus | Native | |
| scented catseye, scented cryptantha, Utah cryptantha | Cryptantha utahensis | Native | |
| Schott agave, Schott’s century plant | Agave schottii | Native | |
| Schott’s calico | Loeseliastrum schottii | Native | |
| Scouler’s campion, Scouler’s catchfly, simple campion | Silene scouleri | Native | |
| Scouler’s St. Johnswort | Hypericum scouleri | Native | |
| Scouler’s willow | Salix scouleriana | Native | |
| scrambled eggs | Corydalis aurea ssp. aurea | Native | |
| Scribner needlegrass, Scribner’s needlegrass | Achnatherum scribneri | Native | |
| scrub oak, shrub live oak, Sonoran scrub oak, turbinella oak | Quercus turbinella | Native | |
| scurfpea, slimflower scurfpea | Psoralidium tenuiflorum | Native | |
| scurfy mallow, scurfymallow | Malvella lepidota | Native | |
| Searles dalea, Searles’ prairie clover, Searle’s prairieclover | Dalea searlsiae | Native | |
| seaside barley | Hordeum marinum | Non-native | |
| seaside brookweed, smallflower water pimpernel, water brookweed | Samolus valerandi ssp. parviflorus | Native | |
| seaside petunia, seaside-petunia | Calibrachoa parviflora | Native | |
| sego lily, sego-lily | Calochortus nuttallii | Native | |
| sentry milk-vetch | Astragalus cremnophylax var. cremnophylax | Native | |
| sentry milkvetch, sentry milk-vetch | Astragalus cremnophylax | Native | |
| shadscale, shadscale saltbush, spiny saltbush | Atriplex confertifolia | Native | |
| sharp-fruit rush, tapertip rush | Juncus acuminatus | Native | |
| sharpleaf valerian | Valeriana acutiloba var. acutiloba | Native | |
| shepherdspurse, shepherd’s-purse | Capsella bursa-pastoris | Non-native | |
| shiny bugseed | Corispermum nitidum | Non-native | |
| shiny chickweed, shiny starwort | Stellaria nitens | Native | |
| shinyleaf sandpaper plant, shinyleaf sandpaperplant, smooth sandpaper plant | Petalonyx nitidus | Native | |
| short foxtail, shortawn foxtail, short-awn meadow-foxtail | Alopecurus aequalis | Native | |
| shortleaf baccharis | Baccharis brachyphylla | Native | |
| shortseed waterwort, short-seed waterwort | Elatine brachysperma | Native | |
| shortstem lupine | Lupinus brevicaulis | Native | |
| showy goldeneye, showy goldeneyes | Heliomeris multiflora | Native | |
| showy goldeneye, showy goldeneyes | Heliomeris multiflora var. multiflora | Native | |
| showy milkweed | Asclepias speciosa | Native | |
| shrubby alkaliaster | Machaeranthera carnosa var. intricata | Native | |
| shy wallflower, smallflower wallflower | Erysimum inconspicuum | Native | |
| sideoats grama | Bouteloua curtipendula | Native | |
| Sierra tansymustard, Sierran tansy mustard, Sierran tansymustard | Descurainia californica | Native | |
| Siler’s penstemon | Penstemon linarioides ssp. sileri | Native | |
| silver beardgrass, silver bluestem | Bothriochloa laguroides ssp. torreyana | Native | |
| silver bluestem | Bothriochloa saccharoides | Native | |
| silver buffaloberry | Shepherdia argentea | Native | |
| silver maple | Acer saccharinum | Non-native | |
| silverleaf milkvetch | Astragalus argophyllus var. panguicensis | Native | |
| silverleaf nightshade, tomato weed, trompillo, white horsenettle, white nightshade | Solanum elaeagnifolium | Non-native | |
| Silver’s milkvetch | Astragalus subcinereus | Native | |
| silverscale, silverscale saltbush, silverscale saltweed | Atriplex argentea | Native | |
| silvery lupine | Lupinus argenteus | Native | |
| Simpson’s buckwheat | Eriogonum microthecum var. simpsonii | Native | |
| Simpson’s hedgehog cactus, snowball pediocactus | Pediocactus simpsonii | Native | |
| singleleaf ash | Fraxinus anomala | Native | |
| single-leaf skunkbush, skunkbush sumac | Rhus trilobata var. simplicifolia | Native | |
| sixweeks grama | Bouteloua barbata | Native | |
| sixweeks threeawn | Aristida adscensionis | Native | |
| skunkbush sumac | Rhus trilobata | Native | |
| skyblue phacelia, skyblue scorpionweed | Phacelia coerulea | Native | |
| slender buckwheat | Eriogonum microthecum var. laxiflorum | Native | |
| slender buckwheat, slenderbush buckwheat, slenderbush eriogonum | Eriogonum microthecum | Native | |
| slender carpet-weed, threadstem carpetweed, thread-stem carpet-weed | Mollugo cerviana | Non-native | |
| slender goldenweed | Machaeranthera gracilis | Native | |
| slender hairgrass | Deschampsia elongata | Native | |
| slender janusia | Janusia gracilis | Native | |
| slender phlox | Phlox gracilis | Native | |
| slender poreleaf, yerba de venado | Porophyllum gracile | Native | |
| slender wheatgrass | Elymus trachycaulus ssp. trachycaulus | Native | |
| slender wheatgrass, slender wild rye | Elymus trachycaulus | Native | |
| slender woodland-star | Lithophragma tenellum | Native | |
| slenderbeak sedge, slender-beak sedge | Carex athrostachya | Native | |
| slenderbranch bedstraw, Wright’s bedstraw | Galium wrightii | Native | |
| slendertube skyrocket, slender-tube skyrocket | Ipomopsis tenuituba | Native | |
| slim tridens | Tridens muticus | Native | |
| slimleaf plains mustard, slimleaf plainsmustard | Schoenocrambe linearifolia | Native | |
| slimstem muhly | Muhlenbergia filiculmis | Native | |
| slim-stem reed grass, slimstem reedgrass | Calamagrostis stricta ssp. stricta | Native | |
| small bedstraw, threepetal bedstraw, three-petal bedstraw | Galium trifidum | Native | |
| small wirelettuce, wire lettuce | Stephanomeria exigua | Native | |
| smallflower fishhook cactus | Sclerocactus parviflorus | Native | |
| smallflower globemallow | Sphaeralcea parvifolia | Native | |
| small-flower valerian, western valerian, western valeriana | Valeriana occidentalis | Native | |
| smallspike false nettle, small-spike false nettle | Boehmeria cylindrica | Native | |
| smilo grass, smilograss | Piptatherum miliaceum | Non-native | |
| smooth barley | Hordeum murinum ssp. glaucum | Non-native | |
| smooth cliffbrake | Pellaea glabella ssp. simplex | Native | |
| smooth desert dandelion, smooth desertdandelion | Malacothrix glabrata | Native | |
| smooth hawksbeard, smooth hawk’s-beard | Crepis capillaris | Non-native | |
| smooth pucoon, smooththroat gromwell, smooththroat stoneseed | Lithospermum cobrense | Native | |
| smooth spreading four o’clock, smooth spreading four-o’clock, spreading four-o’clock | Mirabilis oxybaphoides | Native | |
| smooth sumac | Rhus glabra | Native | |
| soaptree yucca | Yucca elata | Native | |
| soaptree yucca, Verdi yucca | Yucca elata var. verdiensis | Native | |
| soft globemallow | Sphaeralcea incana ssp. cuneata | Native | |
| southern annual saltmarsh aster | Symphyotrichum divaricatum | Native | |
| southern cattail | Typha domingensis | Native | |
| southwestern false cloak fern, southwestern false cloakfern, southwestern falsecloak fern | Argyrochosma limitanea | Native | |
| southwestern false cloak fern, southwestern false cloakfern, southwestern falsecloak fern | Argyrochosma limitanea ssp. limitanea | Native | |
| southwestern ringstem | Anulocaulis leiosolenus var. leiosolenus | Native | |
| southwestern waterwort | Elatine rubella | Native | |
| sowthistle desert dandelion, sowthistle desertdandelion, yellow-saucers | Malacothrix sonchoides | Native | |
| sparse goldenrod, threenerve goldenrod, three-nerve goldenrod | Solidago velutina | Native | |
| spear globemallow, spreading globemallow | Sphaeralcea hastulata | Native | |
| spectacle pod, spectaclepod, touristplant, Wislizeni’s spectaclepod | Dimorphocarpa wislizeni | Native | |
| spike bentgrass | Agrostis exarata | Native | |
| spike dropseed | Sporobolus contractus | Native | |
| spike muhly | Muhlenbergia wrightii | Native | |
| spike trisetum | Trisetum spicatum | Native | |
| spiny cliffbrake | Pellaea truncata | Native | |
| spiny hopsage | Grayia spinosa | Native | |
| spiny milkvetch, spiny milk-vetch | Astragalus kentrophyta | Native | |
| spiny milkwort, spiny polygala | Polygala subspinosa | Native | |
| spiny rush | Juncus acutus | Native | |
| spiny waterstarwort, spring waterstarwort, vernal waterstarwort, vernal water-starwort | Callitriche palustris | Native | |
| spotted buckwheat, spotted wild buckwheat | Eriogonum maculatum | Native | |
| spotted coralroot, summer coralroot | Corallorrhiza maculata | Native | |
| spotted eucrypta, spotted hideseed | Eucrypta chrysanthemifolia var. bipinnatifida | Native | |
| spotted knapweed | Centaurea biebersteinii | Non-native | |
| spreading daisy, spreading fleabane | Erigeron divergens | Native | |
| spreading groundsmoke | Gayophytum diffusum ssp. parviflorum | Native | |
| spreading sandwort | Arenaria lanuginosa | Native | |
| spreading sandwort | Arenaria lanuginosa ssp. saxosa | Native | |
| Springfield’s beard grass, Springfield’s beardgrass | Bothriochloa springfieldii | Native | |
| sprucefir fleabane, spruce-fir fleabane | Erigeron eximius | Native | |
| squaw currant, whisky currant, white squaw currant | Ribes cereum var. pedicellare | Native | |
| squawfeather, wholeleaf Indian paintbrush | Castilleja integra | Native | |
| squawthorn, Torrey wolfberry, Torrey’s wolfberry | Lycium torreyi | Native | |
| squirreltail | Elymus elymoides ssp. brevifolius | Native | |
| Stansbury’s cliffrose | Purshia stansburiana | Native | |
| star gilia, star gily-flower | Gilia stellata | Native | |
| starry bedstraw | Galium stellatum | Native | |
| stemless bitterweed, stemless four-nerve daisy, stemless four-nerve-daisy | Tetraneuris acaulis var. acaulis | Native | |
| stemless Townsend daisy, stemless townsend-daisy, stemless townsendia | Townsendia exscapa | Native | |
| sticky currant | Ribes viscosissimum | Native | |
| sticky starwort, sticky-starwort, tuber starwort | Pseudostellaria jamesiana | Native | |
| stinking milkvetch | Astragalus praelongus | Native | |
| straggling mariposa lily, weakstem mariposa lily, winding mariposa lily | Calochortus flexuosus | Native | |
| streambank wheatgrass, streamside wild rye, thickspike wheatgrass | Elymus lanceolatus ssp. lanceolatus | Native | |
| sugar sumac | Rhus ovata | Native | |
| sulfur buckwheat, sulfur eriogonum, sulphur flower buckwheat, sulphur wildbuckwheat, sulphur-flower buckwheat | Eriogonum umbellatum | Native | |
| sulphur flower buckwheat, sulphurflower buckwheat, sulphur-flower buckwheat | Eriogonum umbellatum var. subaridum | Native | |
| sulphur-flower buckwheat | Eriogonum umbellatum var. majus | Native | |
| sulphur-flower buckwheat, sulphur-flower wild buckwheat | Eriogonum umbellatum var. cognatum | Native | |
| swamp carex, swamp sedge | Carex senta | Native | |
| sweet fennel | Foeniculum vulgare | Occasional | Non-native |
| swordleaf rush, three-stamened rush | Juncus ensifolius | Native | |
| Takhoka-daisy, tanseyleaf aster, tanseyleaf goldenweed, tanseyleaf tansyaster | Machaeranthera tanacetifolia | Native | |
| tall fescue | Lolium arundinaceum | Non-native | |
| tall spiny milkvetch | Astragalus kentrophyta var. elatus | Native | |
| tangelhead, tanglehead | Heteropogon contortus | Native | |
| tawny catseye, tawny cryptantha | Cryptantha fulvocanescens | Native | |
| teddybear cholla | Opuntia bigelovii | Native | |
| Texas dropseed | Sporobolus texanus | Native | |
| Texas milkvine | Matelea producta | Native | |
| Texas mulberry | Morus microphylla | Native | |
| thicket creeper, Virginia creeper, woodbine | Parthenocissus vitacea | Native | |
| thicket globemallow | Sphaeralcea fendleri ssp. elongata | Native | |
| thicket globemallow | Sphaeralcea fendleri ssp. tripartita | Native | |
| thickleaf beardtongue, thickleaf penstemon | Penstemon pachyphyllus var. congestus | Native | |
| thickleaf groundcherry, yellow nightshade groundcherry | Physalis crassifolia | Native | |
| thickleaved wild strawberry, Virginia strawberry, wild strawberry | Fragaria virginiana | Native | |
| thickstem wild cabbage, thick-stem wild cabbage, thickstem wildcabbage | Caulanthus crassicaulis | Native | |
| Thomas’ buckwheat | Eriogonum thomasii | Native | |
| Thompson woolly milkvetch, Thompson’s woolly locoweed, Thompson’s woolly milkvetch, woolly locoweed | Astragalus mollissimus var. thompsoniae | Native | |
| threadbranch sandwort, threadbranch stitchwort, thread-branch stitchwort | Minuartia filiorum | Native | |
| threadleaf groundsel, threadleaf ragwort | Senecio flaccidus var. flaccidus | Native | |
| threadleaf snakeweed | Gutierrezia microcephala | Native | |
| threadstem sandmat, thread-stem sandmat, threadstem spurge | Chamaesyce revoluta | Native | |
| threehearts | Tricardia watsonii | Native | |
| threepetal bedstraw, three-petal bedstraw | Galium trifidum ssp. subbiflorum | Native | |
| Thurber muhly, Thurber’s muhly | Muhlenbergia thurberi | Native | |
| Thurber’s sedge | Carex thurberi | Native | |
| Thurber’s wire lettuce, Thurber’s wirelettuce | Stephanomeria thurberi | Native | |
| thymeleaf sandmat, thyme-leaf sandmat | Chamaesyce serpyllifolia | Native | |
| thymeleaf sandmat, thyme-leaf sandmat, thymeleaf spurge | Chamaesyce serpyllifolia ssp. serpyllifolia | Native | |
| timber oatgrass | Danthonia intermedia | Native | |
| toad rush | Juncus bufonius | Native | |
| toadlily, water Indianlettuce, water miner’s lettuce, water minerslettuce | Montia chamissoi | Native | |
| toothed dock | Rumex dentatus | Non-native | |
| Torrey rush, Torrey’s rush | Juncus torreyi | Native | |
| Torrey’s ephedra, Torrey’s jointfir, Torrey’s Mormon tea | Ephedra torreyana | Native | |
| Torrey’s penstemon | Penstemon barbatus ssp. torreyi | Native | |
| tower rockcress, tower-mustard | Arabis glabra | Native | |
| trailing allionia, trailing four o’clock, trailing windmills | Allionia incarnata | Common | Native |
| trailing daisy, trailing fleabane | Erigeron flagellaris | Native | |
| tree tobacco | Nicotiana glauca | Non-native | |
| trumpet gooseberry | Ribes leptanthum | Native | |
| tufted elkweed, tufted frasera, Utah elkweed | Frasera paniculata | Native | |
| tufted evening primrose, tufted evening-primrose | Oenothera caespitosa | Native | |
| tufted evening primrose, tufted evening-primrose | Oenothera caespitosa ssp. crinita | Native | |
| tufted evening primrose, tufted evening-primrose | Oenothera caespitosa ssp. marginata | Native | |
| tufted fleabane | Erigeron caespitosus | Native | |
| tufted hairgrass | Deschampsia caespitosa | Native | |
| Turkestan beard grass, yellow bluestem | Bothriochloa ischaemum | Occasional | Non-native |
| turtleback, velvet turtleback | Psathyrotes ramosissima | Native | |
| Tusayan fameflower | Talinum validulum | Native | |
| Tweedy’s plantain | Plantago tweedyi | Native | |
| twinleaf bedstraw, twin-leaf bedstraw | Galium bifolium | Native | |
| umbellate chickweed, umbrella starwort | Stellaria umbellata | Native | |
| Underwood’s spikemoss | Selaginella underwoodii | Native | |
| upright blue beardtongue | Penstemon virgatus | Native | |
| Utah agave | Agave utahensis | Common | Native |
| Utah birdsfoot trefoil, Utah bird’s-foot trefoil, Utah bird’s-foot-trefoil | Lotus utahensis | Native | |
| Utah fendlerbush, Utah fendlerella, yerba desierto | Fendlerella utahensis | Native | |
| Utah fleabane | Erigeron utahensis | Native | |
| Utah fleabane | Erigeron utahensis var. sparsifolius | Native | |
| Utah fleabane | Erigeron utahensis var. utahensis | Native | |
| Utah grizzlybear pricklypear, Utah pricklypear | Opuntia erinacea var. utahensis | Native | |
| Utah juniper | Juniperus osteosperma | Native | |
| Utah mortonia | Mortonia utahensis | Native | |
| Utah penstemon | Penstemon utahensis | Native | |
| Utah serviceberry, Utah shadberry, western serviceberry | Amelanchier utahensis | Native | |
| Utah snowberry | Symphoricarpos oreophilus var. utahensis | Native | |
| Utah springparsley, widewing spring parsley, widewing springparsley | Cymopterus purpurascens | Native | |
| Utah yucca | Yucca elata var. utahensis | Native | |
| valley sedge | Carex vallicola | Native | |
| Van Houtt’s spirea | Spiraea vanhouttei | Non-native | |
| variableleaf bushbean, wild bushbean | Macroptilium gibbosifolium | Non-native | |
| velvet ash | Fraxinus velutina | Native | |
| velvetweed | Gaura mollis | Native | |
| vine mesquite, vine-mesquite | Panicum obtusum | Native | |
| Virgin River brittlebush, Virgin River encelia | Encelia virginensis | Native | |
| Virgin River catseye, Virgin River cryptantha, Virgin Valley cryptantha | Cryptantha virginensis | Native | |
| Virginia pepperweed | Lepidium virginicum | Native | |
| Walker’s suncup | Camissonia walkeri | Native | |
| Walker’s suncup | Camissonia walkeri ssp. walkeri | Native | |
| Wallace’s woolydaisy, woolly easterbonnets, woolly easter-bonnets | Antheropeas wallacei | Native | |
| Ward’s bladderpod | Lesquerella wardii | Native | |
| warty caltrop | Kallstroemia parviflora | Native | |
| Wasatch desert parsley, Wasatch desertparsley, Wasatch lomatium | Lomatium bicolor var. leptocarpum | Native | |
| water birch | Betula occidentalis | Native | |
| water knotweed, water smartweed | Polygonum amphibium | Native | |
| water sedge | Carex aquatilis | Native | |
| water smartweed | Polygonum amphibium var. stipulaceum | Native | |
| watercress | Rorippa nasturtium-aquaticum | Non-native | |
| waterthread, waterthread pondweed | Potamogeton diversifolius | Native | |
| Watson’s bedstraw | Galium watsonii | Native | |
| Watson’s goldenbush, Watson’s heath-goldenrod | Ericameria watsonii | Native | |
| wavy scaly cloakfern | Astrolepis sinuata ssp. sinuata | Native | |
| wavyleaf oak | Quercus X pauciloba | Native | |
| wax currant | Ribes cereum | Native | |
| wax currant, white squaw currant | Ribes cereum var. cereum | Native | |
| wedgeleaf draba, wedgeleaf whitlowgrass | Draba cuneifolia | Native | |
| wedgeleaf draba, wedgeleaf whitlowgrass | Draba cuneifolia var. integrifolia | Native | |
| weeping brome | Bromus frondosus | Native | |
| weeping lovegrass | Eragrostis curvula | Non-native | |
| western aster | Symphyotrichum ascendens | Native | |
| western blanketflower | Gaillardia spathulata | Native | |
| western chokecherry | Prunus virginiana var. demissa | Native | |
| western goldenrod, western goldentop | Euthamia occidentalis | Non-native | |
| western honey mesquite | Prosopis glandulosa var. torreyana | Native | |
| western rockjasmine, western rock-jasmine | Androsace occidentalis | Native | |
| western sedge | Carex occidentalis | Native | |
| western soapberry | Sapindus saponaria var. drummondii | Native | |
| western springbeauty | Claytonia rosea | Native | |
| western spruce dwarf mistletoe | Arceuthobium microcarpum | Native | |
| western tansy mustard, western tansymustard | Descurainia pinnata ssp. glabra | Native | |
| western tansy mustard, western tansymustard | Descurainia pinnata ssp. halictorum | Native | |
| Wetherill’s buckwheat, Wetherill’s wild buckwheat | Eriogonum wetherillii | Native | |
| Wheeler’s thistle | Cirsium wheeleri | Native | |
| Whipple cholla | Opuntia whipplei var. whipplei | Native | |
| Whipple’s cholla | Opuntia whipplei | Native | |
| white blazingstar, whitestem blazingstar, whitestem stickleaf, white-stemmed evening-star | Mentzelia albicaulis | Native | |
| white bract stickleaf, whitebract blazingstar | Mentzelia involucrata | Native | |
| white Colorado columbine | Aquilegia coerulea var. ochroleuca | Native | |
| white dalea, white prairie clover, white prairieclover, white prairie-clover | Dalea candida var. oligophylla | Native | |
| white easterbonnets, white easter-bonnets | Antheropeas lanosum | Native | |
| white fir | Abies concolor | Native | |
| white prairie aster | Symphyotrichum falcatum | Native | |
| white prairie aster | Symphyotrichum falcatum var. falcatum | Native | |
| white ratany | Krameria grayi | Native | |
| white sweetclover | Melilotus alba | Non-native | |
| white tidytips, whitedaisy tidytips | Layia glandulosa | Native | |
| whitemargin pussytoes | Antennaria marginata | Native | |
| whitestem gooseberries, whitestem gooseberry | Ribes inerme | Native | |
| white-veined wintergreen | Pyrola picta | Native | |
| whitewoolly twintip, white-woolly twintip | Stemodia durantifolia | Native | |
| wild celery | Apium graveolens | Non-native | |
| wild potato | Solanum jamesii | Native | |
| willow glowweed | Hesperodoria salicina | Native | |
| willowleaf aster | Symphyotrichum praealtum var. praealtum | Native | |
| wing eriogonum, winged buckwheat | Eriogonum alatum | Native | |
| winged buckwheat | Eriogonum alatum var. alatum | Native | |
| winged buckwheat | Eriogonum alatum var. mogollense | Native | |
| winged catseye, winged cryptantha | Cryptantha holoptera | Native | |
| winged pick-me-not, wingnut catseye, wingnut cryptantha | Cryptantha pterocarya | Native | |
| wingfruit suncup, wing-fruit suncup, wingseed suncup | Camissonia pterosperma | Native | |
| wingnut catseye, wingnut cryptantha | Cryptantha pterocarya var. cycloptera | Native | |
| winterfat | Krascheninnikovia lanata | Native | |
| wishbone fiddleleaf | Nama dichotomum | Native | |
| wood spurge, woodland spurge | Euphorbia palmeri | Native | |
| woodland pterostegia, woodland threadstem | Pterostegia drymarioides | Native | |
| Woods’ rose | Rosa woodsii var. ultramontana | Native | |
| Woods’ rose | Rosa woodsii var. woodsii | Native | |
| woolly amosonia, woolly bluestar | Amsonia tomentosa | Native | |
| woolly bluestar | Amsonia tomentosa var. stenophylla | Native | |
| woolly bluestar | Amsonia tomentosa var. tomentosa | Native | |
| woolly cinquefoil | Potentilla hippiana var. hippiana | Native | |
| woolly dalea, woolly prairie clover, woolly prairieclover | Dalea lanata var. terminalis | Native | |
| woolly Indianwheat, woolly plantain | Plantago patagonica | Native | |
| woolly paperflower, wooly paperflower | Psilostrophe tagetina | Native | |
| woolly sedge | Carex pellita | Native | |
| Wooton sedge, Wooton’s sedge | Carex wootonii | Native | |
| Wooton’s ragwort | Senecio wootonii | Native | |
| Wright deervetch, Wright’s deervetch | Lotus wrightii | Native | |
| Wright’s baccharis | Baccharis wrightii | Native | |
| Wright’s bird’s beak, Wright’s bird’s-beak | Cordylanthus wrightii | Native | |
| Wright’s bird’s beak, Wright’s bird’s-beak | Cordylanthus wrightii ssp. tenuifolius | Native | |
| Wright’s silktassel | Garrya wrightii | Native | |
| Wright’s stanleyella, Wright’s thelypody | Thelypodium wrightii | Native | |
| Wyoming Indian paintbrush, Wyoming paintbrush | Castilleja linariifolia | Native | |
| Yavapai buckwheat, Yavapai County buckwheat | Eriogonum ericifolium | Native | |
| Yavapai buckwheat, Yavapai County buckwheat | Eriogonum ericifolium var. pulchrum | Native | |
| yellow avens | Geum aleppicum | Native | |
| yellow beeplant, yellow spiderflower | Cleome lutea | Native | |
| yellow gilia, yellow gily-flower | Gilia filiformis | Native | |
| yellow hawksbeard, yellow hawkweed | Hieracium fendleri | Native | |
| yellow tackstem | Calycoseris parryi | Native | |
| yellowspine thistle | Cirsium ochrocentrum | Native | |
| yerba mansa, yerba-mansa | Anemopsis californica | Native | |
| yucca buckwheat | Eriogonum plumatella | Native | |
| yucca milkvetch | Astragalus lentiginosus var. yuccanus | Native | |
| Zion buckwheat | Eriogonum zionis var. coccineum | Native | |
| Zion buckwheat, Zion wild buckwheat | Eriogonum zionis | Native | |
| Zion milkvetch | Astragalus zionis | Native |
| Amphibians | Birds | Fish | Mammals | Reptiles | Plants |
Note: The wildlife species included in the lists above have been confirmed with the National Park Service to be present in Grand Canyon National Park. Other species may exist in the park that are currently under review or not yet known.
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