California/Nevada (Region 8)
297 Records
Parameters:
- Listing Statuses: Endangered, Threatened, Emergency Listing, Endangered, Emergency Listing, Threatened, Similarity of Appearance (Endangered), Similarity of Appearance (Threatened)
- Lead Regions: Pacific Southwest Region
When searching by State,
please note that a species will show up in the report only if it has a spatial current range.
State associations for a species are based on a spatial current range delineated by
FWS biologists in TESS (and not all species have spatial current range delineated at
the present time).
The current range of species entities consisting of one or more populations does not include states or countries outside those population boundaries, even though the species may occur there in a population not covered by the Endangered Species Act.
The current range of species entities consisting of one or more populations does not include states or countries outside those population boundaries, even though the species may occur there in a population not covered by the Endangered Species Act.
| Scientific Name | Common Name | Lead Region | Federal Listing Status | Where Listed |
|---|---|---|---|---|
| Acanthomintha ilicifolia | San Diego thornmint | 8 | Threatened | Wherever found |
| Acanthomintha obovata ssp. duttonii | San Mateo thornmint | 8 | Endangered | Wherever found |
| Allium munzii | Munz's onion | 8 | Endangered | Wherever found |
| Alopecurus aequalis var. sonomensis | Sonoma alopecurus | 8 | Endangered | Wherever found |
| Ambrosia pumila | San Diego ambrosia | 8 | Endangered | Wherever found |
| Ambrysus amargosus | Ash Meadows naucorid | 8 | Threatened | Wherever found |
| Ambystoma californiense | California tiger Salamander | 8 | Endangered | U.S.A. (CA - Santa Barbara County) |
| Ambystoma californiense | California tiger Salamander | 8 | Endangered | U.S.A. (CA - Sonoma County) |
| Ambystoma californiense | California tiger Salamander | 8 | Threatened | U.S.A. (CA - Central California) |
| Ambystoma macrodactylum croceum | Santa Cruz long-toed salamander | 8 | Endangered | Wherever found |
| Amsinckia grandiflora | Large-flowered fiddleneck | 8 | Endangered | Wherever found |
| Anaxyrus californicus | Arroyo (=arroyo southwestern) toad | 8 | Endangered | Wherever found |
| Anaxyrus canorus | Yosemite toad | 8 | Threatened | Wherever found |
| Anaxyrus williamsi | Dixie Valley Toad | 8 | Endangered | Entire |
| Aplodontia rufa nigra | Point Arena mountain beaver | 8 | Endangered | Wherever found |
| Apodemia mormo langei | Lange's metalmark butterfly | 8 | Endangered | Wherever found |
| Arabis hoffmannii | Hoffmann's rock-cress | 8 | Endangered | Wherever found |
| Arabis macdonaldiana | McDonald's rock-cress | 8 | Endangered | Wherever found |
| Arctostaphylos confertiflora | Santa Rosa Island manzanita | 8 | Endangered | Wherever found |
| Arctostaphylos franciscana | Franciscan manzanita | 8 | Endangered | Wherever found |
| Arctostaphylos glandulosa ssp. crassifolia | Del Mar manzanita | 8 | Endangered | Wherever found |
| Arctostaphylos hookeri var. ravenii | Presidio Manzanita | 8 | Endangered | Wherever found |
| Arctostaphylos morroensis | Morro manzanita | 8 | Threatened | Wherever found |
| Arctostaphylos myrtifolia | Ione manzanita | 8 | Threatened | Wherever found |
| Arctostaphylos pallida | Pallid manzanita | 8 | Threatened | Wherever found |
| Arenaria paludicola | Marsh Sandwort | 8 | Endangered | Wherever found |
| Arenaria ursina | Bear Valley sandwort | 8 | Threatened | Wherever found |
| Astragalus albens | Cushenbury milk-vetch | 8 | Endangered | Wherever found |
| Astragalus applegatei | Applegate's milk-vetch | 8 | Endangered | Wherever found |
| Astragalus brauntonii | Braunton's milk-vetch | 8 | Endangered | Wherever found |
| Astragalus clarianus | Clara Hunt's milk-vetch | 8 | Endangered | Wherever found |
| Astragalus jaegerianus | Lane Mountain milk-vetch | 8 | Endangered | Wherever found |
| Astragalus lentiginosus var. coachellae | Coachella Valley milk-vetch | 8 | Endangered | Wherever found |
| Astragalus lentiginosus var. piscinensis | Fish Slough milk-vetch | 8 | Threatened | Wherever found |
| Astragalus magdalenae var. peirsonii | Peirson's milk-vetch | 8 | Threatened | Wherever found |
| Astragalus phoenix | Ash meadows milk-vetch | 8 | Threatened | Wherever found |
| Astragalus pycnostachyus var. lanosissimus | Ventura Marsh Milk-vetch | 8 | Endangered | Wherever found |
| Astragalus tener var. titi | Coastal dunes milk-vetch | 8 | Endangered | Wherever found |
| Astragalus tricarinatus | Triple-ribbed milk-vetch | 8 | Endangered | Wherever found |
| Atriplex coronata var. notatior | San Jacinto Valley crownscale | 8 | Endangered | Wherever found |
| Baccharis vanessae | Encinitas baccharis | 8 | Threatened | Wherever found |
| Batrachoseps aridus | Desert slender salamander | 8 | Endangered | Wherever found |
| Berberis nevinii | Nevin's barberry | 8 | Endangered | Wherever found |
| Berberis pinnata ssp. insularis | Island Barberry | 8 | Endangered | Wherever found |
| Blennosperma bakeri | Sonoma sunshine | 8 | Endangered | Wherever found |
| Branchinecta conservatio | Conservancy fairy shrimp | 8 | Endangered | Wherever found |
| Branchinecta longiantenna | Longhorn fairy shrimp | 8 | Endangered | Wherever found |
| Branchinecta lynchi | Vernal pool fairy shrimp | 8 | Threatened | Wherever found |
| Branchinecta sandiegonensis | San Diego fairy shrimp | 8 | Endangered | Wherever found |
| Brodiaea filifolia | Thread-leaved brodiaea | 8 | Threatened | Wherever found |
| Brodiaea pallida | Chinese Camp brodiaea | 8 | Threatened | Wherever found |
| Callophrys mossii bayensis | San Bruno elfin butterfly | 8 | Endangered | Wherever found |
| Calochortus tiburonensis | Tiburon mariposa lily | 8 | Threatened | Wherever found |
| Calyptridium pulchellum | Mariposa pussypaws | 8 | Threatened | Wherever found |
| Calystegia stebbinsii | Stebbins' morning-glory | 8 | Endangered | Wherever found |
| Carex albida | White sedge | 8 | Endangered | Wherever found |
| Castilleja affinis ssp. neglecta | Tiburon paintbrush | 8 | Endangered | Wherever found |
| Castilleja campestris ssp. succulenta | Fleshy owl's-clover | 8 | Threatened | Wherever found |
| Castilleja cinerea | Ash-grey paintbrush | 8 | Threatened | Wherever found |
| Castilleja mollis | Soft-leaved paintbrush | 8 | Endangered | Wherever found |
| Catostomus santaanae | Santa Ana sucker | 8 | Threatened | Los Angeles River basin, San Gabriel River basin, Santa Ana River basin |
| Caulanthus californicus | California jewelflower | 8 | Endangered | Wherever found |
| Ceanothus ferrisae | Coyote ceanothus | 8 | Endangered | Wherever found |
| Ceanothus ophiochilus | Vail Lake ceanothus | 8 | Threatened | Wherever found |
| Ceanothus roderickii | Pine Hill ceanothus | 8 | Endangered | Wherever found |
| Centaurium namophilum | Spring-loving centaury | 8 | Threatened | Wherever found |
| Cercocarpus traskiae | Catalina Island mountain-mahogany | 8 | Endangered | Wherever found |
| Chamaesyce hooveri | Hoover's spurge | 8 | Threatened | Wherever found |
| Charadrius nivosus nivosus | Western Snowy Plover | 8 | Threatened | Pacific Coast population DPS-U.S.A. (CA, OR, WA), Mexico (within 50 miles of Pacific coast) |
| Chasmistes brevirostris | Shortnose Sucker | 8 | Endangered | Wherever found |
| Chasmistes cujus | Cui-ui | 8 | Endangered | Wherever found |
| Chelonia mydas | Green sea turtle | 8 | Threatened | Green sea turtles originating from the East Pacific Ocean, bounded by the following lines and coordinates: 41 degrees N., 143 degrees W. in the northwest; 41 degrees N. Lat. in the north; along the western coasts of the Americas; 40 degrees S. Lat. in the south; and 40 degrees S., 96 degrees W. in the southwest |
| Chlorogalum purpureum | Purple amole | 8 | Threatened | Wherever found |
| Chorizanthe howellii | Howell's spineflower | 8 | Endangered | Wherever found |
| Chorizanthe orcuttiana | Orcutt's spineflower | 8 | Endangered | Wherever found |
| Chorizanthe pungens var. hartwegiana | Ben Lomond spineflower | 8 | Endangered | Wherever found |
| Chorizanthe pungens var. pungens | Monterey spineflower | 8 | Threatened | Wherever found |
| Chorizanthe robusta var. hartwegii | Scotts Valley spineflower | 8 | Endangered | Wherever found |
| Chorizanthe robusta var. robusta | Robust spineflower | 8 | Endangered | Wherever found |
| Chorizanthe valida | Sonoma spineflower | 8 | Endangered | Wherever found |
| Cicindela ohlone | Ohlone tiger beetle | 8 | Endangered | Wherever found |
| Cirsium fontinale var. fontinale | Fountain thistle | 8 | Endangered | Wherever found |
| Cirsium fontinale var. obispoense | Chorro Creek bog thistle | 8 | Endangered | Wherever found |
| Cirsium hydrophilum var. hydrophilum | Suisun thistle | 8 | Endangered | Wherever found |
| Cirsium loncholepis | La Graciosa thistle | 8 | Endangered | Wherever found |
| Clarkia franciscana | Presidio clarkia | 8 | Endangered | Wherever found |
| Clarkia imbricata | Vine Hill clarkia | 8 | Endangered | Wherever found |
| Clarkia speciosa ssp. immaculata | Pismo clarkia | 8 | Endangered | Wherever found |
| Clarkia springvillensis | Springville clarkia | 8 | Threatened | Wherever found |
| Cordylanthus maritimus ssp. maritimus | Salt marsh bird's-beak | 8 | Endangered | Wherever found |
| Cordylanthus mollis ssp. mollis | Soft bird's-beak | 8 | Endangered | Wherever found |
| Cordylanthus palmatus | Palmate-bracted bird's beak | 8 | Endangered | Wherever found |
| Cordylanthus tenuis ssp. capillaris | Pennell's bird's-beak | 8 | Endangered | Wherever found |
| Crenichthys baileyi baileyi | White River springfish | 8 | Endangered | Wherever found |
| Crenichthys baileyi grandis | Hiko White River springfish | 8 | Endangered | Wherever found |
| Crenichthys nevadae | Railroad Valley springfish | 8 | Threatened | Wherever found |
| Cupressus abramsiana | Santa Cruz cypress | 8 | Threatened | Wherever found |
| Cupressus goveniana ssp. goveniana | Gowen cypress | 8 | Threatened | Wherever found |
| Cyprinodon diabolis | Devils Hole pupfish | 8 | Endangered | Wherever found |
| Cyprinodon nevadensis mionectes | Ash Meadows Amargosa pupfish | 8 | Endangered | Wherever found |
| Cyprinodon nevadensis pectoralis | Warm Springs pupfish | 8 | Endangered | Wherever found |
| Cyprinodon radiosus | Owens pupfish | 8 | Endangered | Wherever found |
| Deinandra (=Hemizonia) conjugens | Otay tarplant | 8 | Threatened | Wherever found |
| Deinandra increscens ssp. villosa | Gaviota Tarplant | 8 | Endangered | Wherever found |
| Delphinium bakeri | Baker's larkspur | 8 | Endangered | Wherever found |
| Delphinium luteum | Yellow larkspur | 8 | Endangered | Wherever found |
| Deltistes luxatus | Lost River sucker | 8 | Endangered | Wherever found |
| Desmocerus californicus dimorphus | Valley elderberry longhorn beetle | 8 | Threatened | Wherever found |
| Dinacoma caseyi | Casey's June Beetle | 8 | Endangered | Wherever found |
| Diplacus vandenbergensis | Vandenberg monkeyflower | 8 | Endangered | Wherever found |
| Dipodomys heermanni morroensis | Morro Bay kangaroo rat | 8 | Endangered | Wherever found |
| Dipodomys ingens | Giant kangaroo rat | 8 | Endangered | Wherever found |
| Dipodomys merriami parvus | San Bernardino Merriam's kangaroo rat | 8 | Endangered | Wherever found |
| Dipodomys nitratoides exilis | Fresno kangaroo rat | 8 | Endangered | Wherever found |
| Dipodomys nitratoides nitratoides | Tipton kangaroo rat | 8 | Endangered | Wherever found |
| Dipodomys stephensi (incl. D. cascus) | Stephens' kangaroo rat | 8 | Threatened | Wherever found |
| Dodecahema leptoceras | Slender-horned spineflower | 8 | Endangered | Wherever found |
| Dudleya abramsii ssp. parva | Conejo dudleya | 8 | Threatened | Wherever found |
| Dudleya cymosa ssp. marcescens | Marcescent dudleya | 8 | Threatened | Wherever found |
| Dudleya cymosa ssp. ovatifolia | Santa Monica Mountains dudleyea | 8 | Threatened | Wherever found |
| Dudleya setchellii | Santa Clara Valley dudleya | 8 | Endangered | Wherever found |
| Dudleya stolonifera | Laguna Beach liveforever | 8 | Threatened | Wherever found |
| Dudleya traskiae | Santa Barbara Island liveforever | 8 | Endangered | Wherever found |
| Dudleya verityi | Verity's dudleya | 8 | Threatened | Wherever found |
| Elaphrus viridis | Delta green ground beetle | 8 | Threatened | Wherever found |
| Empetrichthys latos | Pahrump poolfish | 8 | Endangered | Wherever found |
| Enceliopsis nudicaulis var. corrugata | Ash Meadows sunray | 8 | Threatened | Wherever found |
| Enhydra lutris nereis | Southern sea otter | 8 | Threatened | Wherever found |
| Eremalche kernensis | Kern mallow | 8 | Endangered | Wherever found |
| Eremichthys acros | Desert dace | 8 | Threatened | Wherever found |
| Eriastrum densifolium ssp. sanctorum | Santa Ana River woolly-star | 8 | Endangered | Wherever found |
| Erigeron parishii | Parish's daisy | 8 | Threatened | Wherever found |
| Eriodictyon altissimum | Indian Knob mountainbalm | 8 | Endangered | Wherever found |
| Eriodictyon capitatum | Lompoc yerba santa | 8 | Endangered | Wherever found |
| Eriogonum apricum (incl. var. prostratum) | Ione (incl. Irish Hill) buckwheat | 8 | Endangered | Wherever found |
| Eriogonum kennedyi var. austromontanum | Southern mountain wild-buckwheat | 8 | Threatened | Wherever found |
| Eriogonum ovalifolium var. vineum | Cushenbury buckwheat | 8 | Endangered | Wherever found |
| Eriogonum ovalifolium var. williamsiae | Steamboat buckwheat | 8 | Endangered | Wherever found |
| Eriogonum tiehmii | Tiehm's buckwheat | 8 | Endangered | Entire |
| Eriophyllum latilobum | San Mateo woolly sunflower | 8 | Endangered | Wherever found |
| Eryngium aristulatum var. parishii | San Diego button-celery | 8 | Endangered | Wherever found |
| Eryngium constancei | Loch Lomond coyote thistle | 8 | Endangered | Wherever found |
| Erysimum capitatum var. angustatum | Contra Costa wallflower | 8 | Endangered | Wherever found |
| Erysimum menziesii | Menzies' wallflower | 8 | Endangered | Wherever found |
| Erysimum teretifolium | Ben Lomond wallflower | 8 | Endangered | Wherever found |
| Eucyclogobius newberryi | Tidewater goby | 8 | Endangered | Wherever found |
| Euphilotes battoides allyni | El Segundo blue butterfly | 8 | Endangered | Wherever found |
| Euphilotes enoptes smithi | Smith's blue butterfly | 8 | Endangered | Wherever found |
| Euphydryas editha bayensis | Bay checkerspot butterfly | 8 | Threatened | Wherever found |
| Euphydryas editha quino (=E. e. wrighti) | Quino checkerspot butterfly | 8 | Endangered | Wherever found |
| Euproserpinus euterpe | Kern primrose sphinx moth | 8 | Threatened | Wherever found |
| Fremontodendron californicum ssp. decumbens | Pine Hill flannelbush | 8 | Endangered | Wherever found |
| Fremontodendron mexicanum | Mexican flannelbush | 8 | Endangered | Wherever found |
| Galium californicum ssp. sierrae | El Dorado bedstraw | 8 | Endangered | Wherever found |
| Gambelia silus | Blunt-nosed leopard lizard | 8 | Endangered | Wherever found |
| Gasterosteus aculeatus williamsoni | Unarmored threespine stickleback | 8 | Endangered | Wherever found |
| Gila bicolor ssp. mohavensis | Mohave tui chub | 8 | Endangered | Wherever found |
| Gila bicolor ssp. snyderi | Owens Tui Chub | 8 | Endangered | Wherever found |
| Gila robusta jordani | Pahranagat roundtail chub | 8 | Endangered | Wherever found |
| Gilia tenuiflora ssp. arenaria | Monterey gilia | 8 | Endangered | Wherever found |
| Gilia tenuiflora ssp. hoffmannii | Hoffmann's slender-flowered gilia | 8 | Endangered | Wherever found |
| Glaucopsyche lygdamus palosverdesensis | Palos Verdes blue butterfly | 8 | Endangered | Wherever found |
| Gopherus agassizii | Desert tortoise | 8 | Similarity of Appearance to a Threatened Taxon | AZ south and east of Colorado R., and Mexico, when found outside of Mexico or said range in AZ |
| Gopherus agassizii | Desert tortoise | 8 | Threatened | Wherever found, except AZ south and east of Colorado R., and Mexico |
| Grindelia fraxinipratensis | Ash Meadows gumplant | 8 | Threatened | Wherever found |
| Gymnogyps californianus | California condor | 8 | Endangered | U.S.A. only, except where listed as an experimental population |
| Helianthemum greenei | Island rush-rose | 8 | Threatened | Wherever found |
| Helminthoglypta walkeriana | Morro shoulderband (=Banded dune) snail | 8 | Threatened | Wherever found |
| Hesperolinon congestum | Marin dwarf-flax | 8 | Threatened | Wherever found |
| Holocarpha macradenia | Santa Cruz tarplant | 8 | Threatened | Wherever found |
| Hypomesus transpacificus | Delta smelt | 8 | Threatened | Wherever found |
| Icaricia icarioides missionensis | Mission blue butterfly | 8 | Endangered | Wherever found |
| Icaricia (Plebejus) shasta charlestonensis | Mount Charleston blue butterfly | 8 | Endangered | Wherever found |
| Ivesia kingii var. eremica | Ash Meadows ivesia | 8 | Threatened | Wherever found |
| Ivesia webberi | Webber's ivesia | 8 | Threatened | Wherever found |
| Lanius ludovicianus mearnsi | San Clemente loggerhead shrike | 8 | Endangered | Wherever found |
| Lasthenia burkei | Burke's goldfields | 8 | Endangered | Wherever found |
| Lasthenia conjugens | Contra Costa goldfields | 8 | Endangered | Wherever found |
| Layia carnosa | Beach layia | 8 | Threatened | Wherever found |
| Lepidomeda albivallis | White River spinedace | 8 | Endangered | Wherever found |
| Lepidomeda mollispinis pratensis | Big Spring spinedace | 8 | Threatened | Wherever found |
| Lepidurus packardi | Vernal pool tadpole shrimp | 8 | Endangered | Wherever found |
| Lesquerella kingii ssp. bernardina | San Bernardino Mountains bladderpod | 8 | Endangered | Wherever found |
| Lessingia germanorum (=L.g. var. germanorum) | San Francisco lessingia | 8 | Endangered | Wherever found |
| Lilium occidentale | Western lily | 8 | Endangered | Wherever found |
| Lilium pardalinum ssp. pitkinense | Pitkin Marsh lily | 8 | Endangered | Wherever found |
| Limnanthes floccosa ssp. californica | Butte County meadowfoam | 8 | Endangered | Wherever found |
| Limnanthes vinculans | Sebastopol meadowfoam | 8 | Endangered | Wherever found |
| Lithophragma maximum | San Clemente Island woodland-star | 8 | Endangered | Wherever found |
| Lupinus constancei | Lassics lupine | 8 | Endangered | Entire |
| Lupinus nipomensis | Nipomo Mesa lupine | 8 | Endangered | Wherever found |
| Lupinus tidestromii | Clover (Tidestrom''s) lupine | 8 | Endangered | Wherever found |
| Lycaeides argyrognomon lotis | Lotis blue butterfly | 8 | Endangered | Wherever found |
| Lycaena hermes | Hermes copper butterfly | 8 | Threatened | Wherever found |
| Malacothamnus fasciculatus var. nesioticus | Santa Cruz Island bush-mallow | 8 | Endangered | Wherever found |
| Malacothrix indecora | Santa Cruz Island malacothrix | 8 | Endangered | Wherever found |
| Malacothrix squalida | Island malacothrix | 8 | Endangered | Wherever found |
| Martes caurina | Pacific Marten, Coastal Distinct Population Segment | 8 | Threatened | Wherever found |
| Masticophis lateralis euryxanthus | Alameda whipsnake (=striped racer) | 8 | Threatened | Wherever found |
| Melozone crissalis eremophilus | Inyo California towhee | 8 | Threatened | Wherever found |
| Mentzelia leucophylla | Ash Meadows blazingstar | 8 | Threatened | Wherever found |
| Microtus californicus scirpensis | Amargosa vole | 8 | Endangered | Wherever found |
| Moapa coriacea | Moapa dace | 8 | Endangered | Wherever found |
| Monardella viminea | Willowy monardella | 8 | Endangered | Wherever found |
| Monolopia (=Lembertia) congdonii | San Joaquin wooly-threads | 8 | Endangered | Wherever found |
| Navarretia fossalis | Spreading navarretia | 8 | Threatened | Wherever found |
| Navarretia leucocephala ssp. pauciflora (=N. pauciflora) | Few-flowered navarretia | 8 | Endangered | Wherever found |
| Navarretia leucocephala ssp. plieantha | Many-flowered navarretia | 8 | Endangered | Wherever found |
| Neostapfia colusana | Colusa grass | 8 | Threatened | Wherever found |
| Neotoma fuscipes riparia | Riparian woodrat (=San Joaquin Valley) | 8 | Endangered | Wherever found |
| Nitrophila mohavensis | Amargosa niterwort | 8 | Endangered | Wherever found |
| Oenothera deltoides ssp. howellii | Antioch Dunes evening-primrose | 8 | Endangered | Wherever found |
| Oncorhynchus aguabonita whitei | Little Kern golden trout | 8 | Threatened | Wherever found |
| Oncorhynchus clarkii henshawi | Lahontan cutthroat trout | 8 | Threatened | Wherever found |
| Oncorhynchus clarkii seleniris | Paiute cutthroat trout | 8 | Threatened | Wherever found |
| Opuntia treleasei | Bakersfield cactus | 8 | Endangered | Wherever found |
| Orcuttia californica | California Orcutt grass | 8 | Endangered | Wherever found |
| Orcuttia inaequalis | San Joaquin Valley Orcutt grass | 8 | Threatened | Wherever found |
| Orcuttia pilosa | Hairy Orcutt grass | 8 | Endangered | Wherever found |
| Orcuttia tenuis | Slender Orcutt grass | 8 | Threatened | Wherever found |
| Orcuttia viscida | Sacramento Orcutt grass | 8 | Endangered | Wherever found |
| Ovis canadensis nelsoni | Peninsular bighorn sheep | 8 | Endangered | U.S.A. (CA) Peninsular Ranges |
| Ovis canadensis sierrae | Sierra Nevada bighorn sheep | 8 | Endangered | U.S.A. (CA) Sierra Nevada |
| Oxytheca parishii var. goodmaniana | Cushenbury oxytheca | 8 | Endangered | Wherever found |
| Pacifastacus fortis | Shasta crayfish | 8 | Endangered | Wherever found |
| Parvisedum leiocarpum | Lake County stonecrop | 8 | Endangered | Wherever found |
| Pekania pennanti | Fisher | 8 | Endangered | Southern Sierra Nevada Distinct Population Segment |
| Pentachaeta bellidiflora | White-rayed pentachaeta | 8 | Endangered | Wherever found |
| Pentachaeta lyonii | Lyon's pentachaeta | 8 | Endangered | Wherever found |
| Perognathus longimembris pacificus | Pacific pocket mouse | 8 | Endangered | Wherever found |
| Phacelia insularis ssp. insularis | Island phacelia | 8 | Endangered | Wherever found |
| Phlox hirsuta | Yreka phlox | 8 | Endangered | Wherever found |
| Piperia yadonii | Yadon's piperia | 8 | Endangered | Wherever found |
| Plagiobothrys strictus | Calistoga allocarya | 8 | Endangered | Wherever found |
| Poa atropurpurea | San Bernardino bluegrass | 8 | Endangered | Wherever found |
| Poa napensis | Napa bluegrass | 8 | Endangered | Wherever found |
| Pogogyne abramsii | San Diego mesa-mint | 8 | Endangered | Wherever found |
| Pogogyne nudiuscula | Otay mesa-mint | 8 | Endangered | Wherever found |
| Polioptila californica californica | Coastal California gnatcatcher | 8 | Threatened | Wherever found |
| Polygonum hickmanii | Scotts Valley Polygonum | 8 | Endangered | Wherever found |
| Polyphylla barbata | Mount Hermon June beetle | 8 | Endangered | Wherever found |
| Potentilla hickmanii | Hickman's potentilla | 8 | Endangered | Wherever found |
| Pseudobahia bahiifolia | Hartweg's golden sunburst | 8 | Endangered | Wherever found |
| Pseudobahia peirsonii | San Joaquin adobe sunburst | 8 | Threatened | Wherever found |
| Pseudocopaeodes eunus obscurus | Carson wandering skipper | 8 | Endangered | Wherever found |
| Pyrgus ruralis lagunae | Laguna Mountains skipper | 8 | Endangered | Wherever found |
| Rallus obsoletus levipes | Light-footed Ridgway''s rail | 8 | Endangered | Wherever found |
| Rallus obsoletus obsoletus | California Ridgway''s rail | 8 | Endangered | Wherever found |
| Rana boylii | Foothill yellow-legged frog | 8 | Endangered | California, Coast Range from Monterey County south to Los Angeles County |
| Rana boylii | Foothill yellow-legged frog | 8 | Endangered | California, Sierra Nevada Mountains south of American River sub-basin south to Transverse Range, Kern County |
| Rana boylii | Foothill yellow-legged frog | 8 | Threatened | California, Central Coast Range south of San Francisco Bay to San Benito and Fresno Counties |
| Rana boylii | Foothill yellow-legged frog | 8 | Threatened | California, North Feather River watershed largely in Plumas and Butte Counties |
| Rana draytonii | California red-legged frog | 8 | Threatened | Wherever found |
| Rana muscosa | Mountain yellow-legged frog | 8 | Endangered | U.S.A., northern California |
| Rana muscosa | Mountain yellow-legged frog | 8 | Endangered | U.S.A., southern California |
| Rana sierrae | Sierra Nevada Yellow-legged Frog | 8 | Endangered | Wherever found |
| Reithrodontomys raviventris | Salt marsh harvest mouse | 8 | Endangered | wherever found |
| Rhaphiomidas terminatus abdominalis | Delhi Sands flower-loving fly | 8 | Endangered | Wherever found |
| Rhinichthys osculus lethoporus | Independence Valley speckled dace | 8 | Endangered | Wherever found |
| Rhinichthys osculus nevadensis | Ash Meadows speckled dace | 8 | Endangered | Wherever found |
| Rhinichthys osculus oligoporus | Clover Valley speckled dace | 8 | Endangered | Wherever found |
| Rorippa gambellii | Gambel's watercress | 8 | Endangered | Wherever found |
| Senecio layneae | Layne's butterweed | 8 | Threatened | Wherever found |
| Sibara filifolia | Santa Cruz Island rockcress | 8 | Endangered | Wherever found |
| Sidalcea keckii | Keck's Checker-mallow | 8 | Endangered | Wherever found |
| Sidalcea oregana ssp. valida | Kenwood Marsh checker-mallow | 8 | Endangered | Wherever found |
| Sidalcea pedata | Pedate checker-mallow | 8 | Endangered | Wherever found |
| Sorex ornatus relictus | Buena Vista Lake ornate Shrew | 8 | Endangered | Wherever found |
| Speyeria callippe callippe | Callippe silverspot butterfly | 8 | Endangered | Wherever found |
| Speyeria zerene behrensii | Behren's silverspot butterfly | 8 | Endangered | Wherever found |
| Speyeria zerene myrtleae | Myrtle's silverspot butterfly | 8 | Endangered | Wherever found |
| Sternula antillarum browni | California least tern | 8 | Endangered | Wherever found |
| Streptanthus albidus ssp. albidus | Metcalf Canyon jewelflower | 8 | Endangered | Wherever found |
| Streptanthus niger | Tiburon jewelflower | 8 | Endangered | Wherever found |
| Streptocephalus woottoni | Riverside fairy shrimp | 8 | Endangered | Wherever found |
| Suaeda californica | California seablite | 8 | Endangered | Entire |
| Swallenia alexandrae | Eureka Dune grass | 8 | Threatened | Entire |
| Sylvilagus bachmani riparius | Riparian brush rabbit | 8 | Endangered | Wherever found |
| Syncaris pacifica | California freshwater shrimp | 8 | Endangered | Wherever found |
| Taraxacum californicum | California taraxacum | 8 | Endangered | Wherever found |
| Thamnophis gigas | Giant garter snake | 8 | Threatened | Wherever found |
| Thamnophis sirtalis tetrataenia | San Francisco garter snake | 8 | Endangered | Wherever found |
| Thelypodium stenopetalum | Slender-petaled mustard | 8 | Endangered | Wherever found |
| Thlaspi californicum | Kneeland Prairie penny-cress | 8 | Endangered | Wherever found |
| Thysanocarpus conchuliferus | Santa Cruz Island fringepod | 8 | Endangered | Wherever found |
| Trifolium amoenum | Showy Indian clover | 8 | Endangered | Wherever found |
| Trifolium trichocalyx | Monterey clover | 8 | Endangered | Wherever found |
| Trimerotropis infantilis | Zayante band-winged grasshopper | 8 | Endangered | Wherever found |
| Tuctoria greenei | Greene's tuctoria | 8 | Endangered | Wherever found |
| Tuctoria mucronata | Solano grass | 8 | Endangered | Wherever found |
| Uma inornata | Coachella Valley fringe-toed lizard | 8 | Threatened | Wherever found |
| Urocyon littoralis catalinae | Santa Catalina Island Fox | 8 | Threatened | Wherever found |
| Verbena californica | Red Hills vervain | 8 | Threatened | Wherever found |
| Verbesina dissita | Big-leaved crownbeard | 8 | Threatened | Wherever found |
| Vireo bellii pusillus | Least Bell's vireo | 8 | Endangered | Wherever found |
| Vulpes macrotis mutica | San Joaquin kit fox | 8 | Endangered | wherever found |
| Vulpes vulpes necator | Sierra Nevada red fox | 8 | Endangered | Sierra Nevada DPS |