Threatened & Endangered Plants
(alphabetical by common name)
Additional
information
about categories or terms in this list is
available.
Published in the Federal Register
--current through Mar 1995
Common Name......Amargosa niterwort
Scientific Name..Nitrophila mohavensis
Historic Range...U.S.A. (CA, NV)
Plant Family.....Chenopodiaceae
Status...........E
When Listed......181
Critical Habitat.17.96(a)
Special Rule.....NA
Common Name......Antioch Dunes evening-primrose
Scientific Name..Oenothera deltoides ssp. howellii
Historic Range...U.S.A. (CA)
Plant Family.....Onagraceae
Status...........E
When Listed......39
Critical Habitat.17.96(a)
Special Rule.....NA
Common Name......Arizona agave
Scientific Name..Agave arizonica
Historic Range...U.S.A. (AZ)
Plant Family.....Agavaceae
Status...........E
When Listed......147
Critical Habitat.NA
Special Rule.....NA
Common Name......Arizona cliffrose
Scientific Name..Purshia subintegra (=Cowania s.)
Historic Range...U.S.A. (AZ)
Plant Family.....Rosaceae
Status...........E
When Listed......148
Critical Habitat.NA
Special Rule.....NA
Common Name......Arizona hedgehog cactus
Scientific Name..Echinocereus triglochidiatus var. arizonicus (=E. arizonicus)
Historic Range...U.S.A. (AZ)
Plant Family.....Cactaceae
Status...........E
When Listed......62
Critical Habitat.NA
Special Rule.....NA
Common Name......Ash Meadows blazing-star
Scientific Name..Mentzelia leucophylla
Historic Range...U.S.A. (NV)
Plant Family.....Loasaceae
Status...........T
When Listed......181
Critical Habitat.17.96(a)
Special Rule.....NA
Common Name......Ash Meadows gumplant
Scientific Name..Grindelia fraxino-pratensis
Historic Range...U.S.A. (CA, NV)
Plant Family.....Asteraceae
Status...........T
When Listed......181
Critical Habitat.17.96(a)
Special Rule.....NA
Common Name......Ash Meadows ivesia
Scientific Name..Ivesia kingii var. eremica
Historic Range...U.S.A. (NV)
Plant Family.....Rosaceae
Status...........T
When Listed......181
Critical Habitat.17.96(a)
Special Rule.....NA
Common Name......Ash Meadows milk-vetch
Scientific Name..Astragalus phoenix
Historic Range...U.S.A. (NV)
Plant Family.....Fabaceae
Status...........T
When Listed......181
Critical Habitat.17.96(a)
Special Rule.....NA
Common Name......Ash Meadows sunray
Scientific Name..Enceliopsis nudicaulis var. corrugata
Historic Range...U.S.A. (NV)
Plant Family.....Asteraceae
Status...........T
When Listed......181
Critical Habitat.17.96(a)
Special Rule.....NA
Common Name......Ashy dogweed
Scientific Name..Thymophylla tephroleuca (=Dyssodia t.)
Historic Range...U.S.A. (TX)
Plant Family.....Asteraceae
Status...........E
When Listed......152
Critical Habitat.NA
Special Rule.....NA
Common Name......Autumn buttercup
Scientific Name..Ranunculus acriformis (=R. acris var. a.)
Historic Range...U.S.A. (UT)
Plant Family.....Ranunculaceae
Status...........E
When Listed......355
Critical Habitat.NA
Special Rule.....NA
Common Name......Bakersfield cactus
Scientific Name..Opuntia treleasei
Historic Range...U.S.A. (CA)
Plant Family.....Cactaceae
Status...........E
When Listed......395
Critical Habitat.NA
Special Rule.....NA
Common Name......Barneby reed-mustard
Scientific Name..Schoenocrambe barnebyi
Historic Range...U.S.A. (UT)
Plant Family.....Brassicaceae
Status...........E
When Listed......457
Critical Habitat.NA
Special Rule.....NA
Common Name......Barneby ridge-cress (=peppercress)
Scientific Name..Lepidium barnebyanum
Historic Range...U.S.A. (UT)
Plant Family.....Brassicaceae
Status...........E
When Listed......402
Critical Habitat.NA
Special Rule.....NA
Common Name......Beach layia
Scientific Name..Layia carnosa
Historic Range...U.S.A. (CA)
Plant Family.....Asteraceae
Status...........E
When Listed......472
Critical Habitat.NA
Special Rule.....NA
Common Name......Black lace cactus
Scientific Name..Echinocereus reichenbachii var. albertii (=E. melanocentrus)
Historic Range...U.S.A. (TX)
Plant Family.....Cactaceae
Status...........E
When Listed......68
Critical Habitat.NA
Special Rule.....NA
Common Name......Brady pincushion cactus
Scientific Name..Pediocactus bradyi (=Toumeya b.)
Historic Range...U.S.A. (AZ)
Plant Family.....Cactaceae
Status...........E
When Listed......63
Critical Habitat.NA
Special Rule.....NA
Common Name......Bunched cory cactus
Scientific Name..Coryphantha ramillosa
Historic Range...U.S.A. (TX), Mexico (Coahuila)
Plant Family.....Cactaceae
Status...........T
When Listed......77
Critical Habitat.NA
Special Rule.....NA
Common Name......Burke's goldfields
Scientific Name..Lasthenia burkei
Historic Range...U.S.A. (CA)
Plant Family.....Asteraceae
Status...........E
When Listed......453
Critical Habitat.NA
Special Rule.....NA
Common Name......Butte County meadowfoam
Scientific Name..Limnanthes floccosa ssp. californica
Historic Range...U.S.A. (CA)
Plant Family.....Limnanthaceae
Status...........E
When Listed......471
Critical Habitat.NA
Special Rule.....NA
Common Name......California Orcutt grass
Scientific Name..Orcuttia californica
Historic Range...U.S.A. (CA)
Plant Family.....Poaceae
Status...........E
When Listed......512
Critical Habitat.NA
Special Rule.....NA
Common Name......California jewelflower
Scientific Name..Caulanthus californicus
Historic Range...U.S.A. (CA)
Plant Family.....Brassicaceae
Status...........E
When Listed......395
Critical Habitat.NA
Special Rule.....NA
Common Name......Chisos Mountain hedgehog cactus
Scientific Name..Echinocereus chisoensis var. chisoensis (=E. reichenbachii var. c.^)
Historic Range...U.S.A. (TX)
Plant Family.....Cactaceae
Status...........T
When Listed......335
Critical Habitat.NA
Special Rule.....NA
Common Name......Clarkia, Pismo
Scientific Name..Clarkia speciosa ssp. immaculata
Historic Range...U.S.A. (CA)
Plant Family.....Onagraceae
Status...........E
When Listed......567
Critical Habitat.
Special Rule.....
Common Name......Clay phacelia
Scientific Name..Phacelia argillacea
Historic Range...U.S.A. (UT)
Plant Family.....Hydrophyllaceae
Status...........E
When Listed......44
Critical Habitat.NA
Special Rule.....NA
Common Name......Clay reed-mustard
Scientific Name..Schoenocrambe argillacea
Historic Range...U.S.A. (UT)
Plant Family.....Brassicaceae
Status...........T
When Listed......457
Critical Habitat.NA
Special Rule.....NA
Common Name......Clay-loving wild-buckwheat
Scientific Name..Eriogonum pelinophilum
Historic Range...U.S.A. (CO)
Plant Family.....Polygonaceae
Status...........E
When Listed......151
Critical Habitat.17.96(a)
Special Rule.....NA
Common Name......Clover lupine
Scientific Name..Lupinus tidestromii
Historic Range...U.S.A. (CA)
Plant Family.....Fabaceae
Status...........E
When Listed......472
Critical Habitat.NA
Special Rule.....NA
Common Name......Cochise pincushion cactus
Scientific Name..Coryphantha robbinsorum (=Cochiseia r., Escobaria r.)
Historic Range...U.S.A. (AZ), Mexico (Sonora)
Plant Family.....Cactaceae
Status...........T
When Listed......214
Critical Habitat.NA
Special Rule.....NA
Common Name......Contra Costa wallflower
Scientific Name..Erysimum capitatum var. angustatum
Historic Range...U.S.A. (CA)
Plant Family.....Brassicaceae
Status...........E
When Listed......39
Critical Habitat.17.96(a)
Special Rule.....NA
Common Name......Cushenbury buckwheat
Scientific Name..Eriogonum ovalifolium var. vineum
Historic Range...U.S.A. (CA)
Plant Family.....Polygonaceae
Status...........E
When Listed......548
Critical Habitat.NA
Special Rule.....NA
Common Name......Cushenbury milk-vetch
Scientific Name..Astragalus albens
Historic Range...U.S.A. (CA)
Plant Family.....Fabaceae
Status...........E
When Listed......548
Critical Habitat.NA
Special Rule.....NA
Common Name......Cushenbury oxytheca
Scientific Name..Oxytheca parishii var. goodmaniana
Historic Range...U.S.A. (CA)
Plant Family.....Polygonaceae
Status...........E
When Listed......548
Critical Habitat.NA
Special Rule.....NA
Common Name......Davis' green pitaya
Scientific Name..Echinocereus viridiflorus var. davisii (=E. davisii)
Historic Range...U.S.A. (TX)
Plant Family.....Cactaceae
Status...........E
When Listed......81
Critical Habitat.NA
Special Rule.....NA
Common Name......Dudley Bluffs bladderpod
Scientific Name..Lesquerella congesta
Historic Range...U.S.A. (CO)
Plant Family.....Brassicaceae
Status...........T
When Listed......374
Critical Habitat.NA
Special Rule.....NA
Common Name......Dudley Bluffs twinpod
Scientific Name..Physaria obcordata
Historic Range...U.S.A. (CO)
Plant Family.....Brassicaceae
Status...........T
When Listed......374
Critical Habitat.NA
Special Rule.....NA
Common Name......Dwarf bear-poppy
Scientific Name..Arctomecon humilis
Historic Range...U.S.A. (UT)
Plant Family.....Papaveraceae
Status...........E
When Listed......78
Critical Habitat.NA
Special Rule.....NA
Common Name......Eureka Dune grass
Scientific Name..Swallenia alexandrae
Historic Range...U.S.A. (CA)
Plant Family.....Poaceae
Status...........E
When Listed......39
Critical Habitat.NA
Special Rule.....NA
Common Name......Eureka Valley evening-primrose
Scientific Name..Oenothera avita ssp. eurekensis
Historic Range...U.S.A. (CA)
Plant Family.....Onagraceae
Status...........E
When Listed......39
Critical Habitat.NA
Special Rule.....NA
Common Name......Gambel's watercress
Scientific Name..Rorippa gambellii
Historic Range...U.S.A. (CA)
Plant Family.....Brassicaceae
Status...........E
When Listed......511
Critical Habitat.NA
Special Rule.....NA
Common Name......Gypsum wild-buckwheat
Scientific Name..Eriogonum gypsophilum
Historic Range...U.S.A. (NM)
Plant Family.....Polygonaceae
Status...........T
When Listed......110, 112
Critical Habitat.17.96(a)
Special Rule.....NA
Common Name......Heliotrope milk-vetch
Scientific Name..Astragalus montii (=A. limnocharis var. m.)
Historic Range...U.S.A. (UT)
Plant Family.....Fabaceae
Status...........T
When Listed......298
Critical Habitat.17.96(a)
Special Rule.....NA
Common Name......Hinckley's oak
Scientific Name..Quercus hinckleyi
Historic Range...U.S.A. (TX)
Plant Family.....Fagaceae
Status...........T
When Listed......318
Critical Habitat.NA
Special Rule.....NA
Common Name......Holy Ghost ipomopsis
Scientific Name..Ipomopsis sancti-spiritus
Historic Range...U.S.A. (NM)
Plant Family.....Polemoniaceae
Status...........E
When Listed......535
Critical Habitat.NA
Special Rule.....NA
Common Name......Hoover's woolly-star
Scientific Name..Eriastrum hooveri
Historic Range...U.S.A. (CA)
Plant Family.....Polemoniaceae
Status...........T
When Listed......395
Critical Habitat.NA
Special Rule.....NA
Common Name......Howell's spineflower
Scientific Name..Chorizanthe howellii
Historic Range...U.S.A. (CA)
Plant Family.....Polygonaceae
Status...........E
When Listed......472
Critical Habitat.NA
Special Rule.....NA
Common Name......Howellia, water
Scientific Name..Howellia aquatilis
Historic Range...U.S.A. (CA, ID, MT, OR, WA)
Plant Family.....Campanulaceae
Status...........T
When Listed......542
Critical Habitat.NA
Special Rule.....NA
Common Name......Johnston's frankenia
Scientific Name..Frankenia johnstonii
Historic Range...U.S.A. (TX), Mexico (Nuevo Leon)
Plant Family.....Frankeniaceae
Status...........E
When Listed......155
Critical Habitat.NA
Special Rule.....NA
Common Name......Jones cycladenia
Scientific Name..Cycladenia humilis var. jonesii
Historic Range...U.S.A. (AZ, UT)
Plant Family.....Apocynaceae
Status...........T
When Listed......229
Critical Habitat.NA
Special Rule.....NA
Common Name......Kearney's blue-star
Scientific Name..Amsonia kearneyana
Historic Range...U.S.A. (AZ)
Plant Family.....Apocynaceae
Status...........E
When Listed......343
Critical Habitat.NA
Special Rule.....NA
Common Name......Kern mallow
Scientific Name..Eremalche kernensis (=E. parryi ssp. k.)
Historic Range...U.S.A. (CA)
Plant Family.....Malvaceae
Status...........E
When Listed......395
Critical Habitat.NA
Special Rule.....NA
Common Name......Knowlton cactus
Scientific Name..Pediocactus knowltonii (=P. bradyi var. k., Toumeya k.)
Historic Range...U.S.A. (CO, NM)
Plant Family.....Cactaceae
Status...........E
When Listed......72
Critical Habitat.NA
Special Rule.....NA
Common Name......Kodachrome bladderpod
Scientific Name..Lesquerella tumulosa
Historic Range...U.S.A. (UT)
Plant Family.....Brassicaceae
Status...........E
When Listed......519
Critical Habitat.NA
Special Rule.....NA
Common Name......Kuenzler hedgehog cactus
Scientific Name..Echinocereus fendleri var. kuenzleri (=E. kuenzleri, E. hempelii of authors, not Fobe)
Historic Range...U.S.A. (NM)
Plant Family.....Cactaceae
Status...........E
When Listed......70
Critical Habitat.NA
Special Rule.....NA
Common Name......Large-flowered fiddleneck
Scientific Name..Amsinckia grandiflora
Historic Range...U.S.A. (CA)
Plant Family.....Boraginaceae
Status...........E
When Listed......179
Critical Habitat.17.96(a)
Special Rule.....NA
Common Name......Large-fruited sand-verbena
Scientific Name..Abronia macrocarpa
Historic Range...U.S.A. (TX)
Plant Family.....Nyctaginaceae
Status...........E
When Listed......331
Critical Habitat.NA
Special Rule.....NA
Common Name......Last Chance townsendia
Scientific Name..Townsendia aprica
Historic Range...U.S.A. (UT)
Plant Family.....Asteraceae
Status...........T
When Listed......200
Critical Habitat.NA
Special Rule.....NA
Common Name......Lee pincushion cactus
Scientific Name..Coryphantha sneedii var. leei (=Escobaria l., Mammillaria l.)
Historic Range...U.S.A. (NM)
Plant Family.....Cactaceae
Status...........T
When Listed......61
Critical Habitat.NA
Special Rule.....NA
Common Name......Little Aguja pondweed
Scientific Name..Potamogeton clystocarpus
Historic Range...U.S.A. (TX)
Plant Family.....Potamogetonaceae
Status...........E
When Listed......450
Critical Habitat.NA
Special Rule.....NA
Common Name......Lloyd's Mariposa cactus
Scientific Name..Echinomastus mariposensis (=Echinocactus m., Sclerocactus m., Neolloydia m.)
Historic Range...U.S.A. (TX), Mexico (Coahuila)
Plant Family.....Cactaceae
Status...........T
When Listed......77
Critical Habitat.NA
Special Rule.....NA
Common Name......Lloyd's hedgehog cactus
Scientific Name..Echinocereus lloydii (=E. roetteri var. l.)
Historic Range...U.S.A. (NM, TX)
Plant Family.....Cactaceae
Status...........E
When Listed......67
Critical Habitat.NA
Special Rule.....NA
Common Name......Loch Lomond coyote-thistle
Scientific Name..Eryngium constancei
Historic Range...U.S.A. (CA)
Plant Family.....Apiaceae
Status...........E
When Listed......194E, 249
Critical Habitat.NA
Special Rule.....NA
Common Name......Maguire daisy
Scientific Name..Erigeron maguirei var. maguirei
Historic Range...U.S.A. (UT)
Plant Family.....Asteraceae
Status...........E
When Listed......202
Critical Habitat.NA
Special Rule.....NA
Common Name......Maguire primrose
Scientific Name..Primula maguirei
Historic Range...U.S.A. (UT)
Plant Family.....Primulaceae
Status...........T
When Listed......199
Critical Habitat.NA
Special Rule.....NA
Common Name......Mancos milk-vetch
Scientific Name..Astragalus humillimus
Historic Range...U.S.A. (CO, NM)
Plant Family.....Fabaceae
Status...........E
When Listed......187
Critical Habitat.NA
Special Rule.....NA
Common Name......Manzanita, Morro
Scientific Name..Arctostaphylos morroensis
Historic Range...U.S.A. (CA)
Plant Family.....Ericaceae
Status...........T
When Listed......567
Critical Habitat.NA
Special Rule.....NA
Common Name......Marsh sandwort
Scientific Name..Arenaria paludicola
Historic Range...U.S.A. (CA)
Plant Family.....Caryophyllaceae
Status...........E
When Listed......511
Critical Habitat.NA
Special Rule.....NA
Common Name......McDonald's rock-cress
Scientific Name..Arabis mcdonaldiana
Historic Range...U.S.A. (CA)
Plant Family.....Brassicaceae
Status...........E
When Listed......44
Critical Habitat.NA
Special Rule.....NA
Common Name......Menzies' wallflower
Scientific Name..Erysimum menziesii
Historic Range...U.S.A. (CA)
Plant Family.....Brassicaceae
Status...........E
When Listed......472
Critical Habitat.NA
Special Rule.....NA
Common Name......Mesa Verde cactus
Scientific Name..Sclerocactus mesae-verdae (=Coloradoa m., Echinocactus m., Pediocactus m.)
Historic Range...U.S.A. (CO, NM)
Plant Family.....Cactaceae
Status...........T
When Listed......75
Critical Habitat.NA
Special Rule.....NA
Common Name......Monterey gilia
Scientific Name..Gilia tenuiflora ssp. arenaria
Historic Range...U.S.A. (CA)
Plant Family.....Polemoniaceae
Status...........E
When Listed......472
Critical Habitat.NA
Special Rule.....NA
Common Name......Mountain balm, Indian Knob
Scientific Name..Eriodictyon altissimum
Historic Range...U.S.A. (CA)
Plant Family.....Hydrophyllaceae
Status...........E
When Listed......567
Critical Habitat.NA
Special Rule.....NA
Common Name......Navajo sedge
Scientific Name..Carex specuicola
Historic Range...U.S.A. (AZ)
Plant Family.....Cyperaceae
Status...........T
When Listed......178
Critical Habitat.17.96(a)
Special Rule.....NA
Common Name......Navasota ladies'-tresses
Scientific Name..Spiranthes parksii
Historic Range...U.S.A. (TX)
Plant Family.....Orchidaceae
Status...........E
When Listed......116
Critical Habitat.NA
Special Rule.....NA
Common Name......Nellie cory cactus
Scientific Name..Coryphantha minima (=C. nellieae, Escobaria m., E. n., Mammillaria n.)
Historic Range...U.S.A. (TX)
Plant Family.....Cactaceae
Status...........E
When Listed......81
Critical Habitat.NA
Special Rule.....NA
Common Name......Nichol's Turk's head cactus
Scientific Name..Echinocactus horizonthalonius var. nicholii
Historic Range...U.S.A. (AZ)
Plant Family.....Cactaceae
Status...........E
When Listed......71
Critical Habitat.NA
Special Rule.....NA
Common Name......North Park phacelia
Scientific Name..Phacelia formosula
Historic Range...U.S.A. (CO)
Plant Family.....Hydrophyllaceae
Status...........E
When Listed......121
Critical Habitat.NA
Special Rule.....NA
Common Name......Osterhout milk-vetch
Scientific Name..Astragalus osterhoutii
Historic Range...U.S.A. (CO)
Plant Family.....Fabaceae
Status...........E
When Listed......353
Critical Habitat.NA
Special Rule.....NA
Common Name......Otay mesa mint
Scientific Name..Pogogyne nudiuscula
Historic Range...U.S.A. (CA), Mexico (Baja California)
Plant Family.....Lamiaceae
Status...........E
When Listed......512
Critical Habitat.NA
Special Rule.....NA
Common Name......Palmate-bracted bird's-beak
Scientific Name..Cordylanthus palmatus
Historic Range...U.S.A. (CA)
Plant Family.....Scrophulariaceae
Status...........E
When Listed......235
Critical Habitat.NA
Special Rule.....NA
Common Name......Parish's daisy
Scientific Name..Erigeron parishii
Historic Range...U.S.A. (CA)
Plant Family.....Asteraceae
Status...........T
When Listed......548
Critical Habitat.NA
Special Rule.....NA
Common Name......Pedate checker-mallow
Scientific Name..Sidalcea pedata
Historic Range...U.S.A. (CA)
Plant Family.....Malvaceae
Status...........E
When Listed......158
Critical Habitat.NA
Special Rule.....NA
Common Name......Peebles Navajo cactus
Scientific Name..Pediocactus peeblesianus var. peeblesianus (=Echinocactus p., Navajoa p., Toumeya p., Utahia p.)
Historic Range...U.S.A. (AZ)
Plant Family.....Cactaceae
Status...........E
When Listed......69
Critical Habitat.NA
Special Rule.....NA
Common Name......Penland alpine fen mustard
Scientific Name..Eutrema penlandii
Historic Range...U.S.A. (CO)
Plant Family.....Brassicaceae
Status...........T
When Listed......509
Critical Habitat.NA
Special Rule.....NA
Common Name......Penland beardtongue
Scientific Name..Penstemon penlandii
Historic Range...U.S.A. (CO)
Plant Family.....Scrophulariaceae
Status...........E
When Listed......353
Critical Habitat.NA
Special Rule.....NA
Common Name......Pima pineapple cactus
Scientific Name..Coryphantha scheeri var. robustispina
Historic Range...U.S.A. (AZ), Mexico (Sonora)
Plant Family.....Cactaceae
Status...........E
When Listed......515
Critical Habitat.NA
Special Rule.....NA
Common Name......Presidio (=Raven's) manzanita
Scientific Name..Arctostaphylos hookeri var. ravenii (=A. pungens ssp. r.)^
Historic Range...U.S.A. (CA)
Plant Family.....Ericaceae
Status...........E
When Listed......65
Critical Habitat.NA
Special Rule.....NA
Common Name......Sacramento Mountains thistle
Scientific Name..Cirsium vinaceum
Historic Range...U.S.A. (NM)
Plant Family.....Asteraceae
Status...........T
When Listed......276
Critical Habitat.NA
Special Rule.....NA
Common Name......Sacramento prickly-poppy
Scientific Name..Argemone pleiacantha ssp. pinnatisecta
Historic Range...U.S.A. (NM)
Plant Family.....Papaveraceae
Status...........E
When Listed......360
Critical Habitat.NA
Special Rule.....NA
Common Name......Salt marsh bird's-beak
Scientific Name..Cordylanthus maritimus ssp. maritimus
Historic Range...U.S.A. (CA), Mexico (Baja California)
Plant Family.....Scrophulariaceae
Status...........E
When Listed......44
Critical Habitat.NA
Special Rule.....NA
Common Name......San Benito evening-primrose
Scientific Name..Camissonia benitensis
Historic Range...U.S.A. (CA)
Plant Family.....Onagraceae
Status...........T
When Listed......172
Critical Habitat.NA
Special Rule.....NA
Common Name......San Bernardino Mountains bladderpod
Scientific Name..Lesquerella kingii ssp. bernardina
Historic Range...U.S.A. (CA)
Plant Family.....Brassicaceae
Status...........E
When Listed......548
Critical Habitat.NA
Special Rule.....NA
Common Name......San Clemente Island Indian paintbrush
Scientific Name..Castilleja grisea
Historic Range...U.S.A. (CA)
Plant Family.....Scrophulariaceae
Status...........E
When Listed......26
Critical Habitat.NA
Special Rule.....NA
Common Name......San Clemente Island broom
Scientific Name..Lotus dendroideus ssp. traskiae (=L. scoparius ssp. t.^)
Historic Range...U.S.A. (CA)
Plant Family.....Fabaceae
Status...........E
When Listed......26
Critical Habitat.NA
Special Rule.....NA
Common Name......San Clemente Island bush-mallow
Scientific Name..Malacothamnus clementinus
Historic Range...U.S.A. (CA)
Plant Family.....Malvaceae
Status...........E
When Listed......26
Critical Habitat.NA
Special Rule.....NA
Common Name......San Clemente Island larkspur
Scientific Name..Delphinium variegatum ssp. kinkiense (=D. k.)
Historic Range...U.S.A. (CA)
Plant Family.....Ranunculaceae
Status...........E
When Listed......26
Critical Habitat.NA
Special Rule.....NA
Common Name......San Diego button-celery
Scientific Name..Eryngium aristulatum var. parishii
Historic Range...U.S.A. (CA)
Plant Family.....Apiaceae
Status...........E
When Listed......512
Critical Habitat.NA
Special Rule.....NA
Common Name......San Diego mesa mint
Scientific Name..Pogogyne abramsii
Historic Range...U.S.A. (CA)
Plant Family.....Lamiaceae
Status...........E
When Listed......44
Critical Habitat.NA
Special Rule.....NA
Common Name......San Francisco Peaks groundsel
Scientific Name..Senecio franciscanus
Historic Range...U.S.A. (AZ)
Plant Family.....Asteraceae
Status...........T
When Listed......137
Critical Habitat.17.96(a)
Special Rule.....NA
Common Name......San Joaquin wooly-threads
Scientific Name..Lembertia congdonii
Historic Range...U.S.A. (CA)
Plant Family.....Asteraceae
Status...........E
When Listed......395
Critical Habitat.NA
Special Rule.....NA
Common Name......San Mateo thornmint
Scientific Name..Acanthomintha obovata ssp. duttonii
Historic Range...U.S.A. (CA)
Plant Family.....Lamiaceae
Status...........E
When Listed......204
Critical Habitat.NA
Special Rule.....NA
Common Name......San Rafael cactus
Scientific Name..Pediocactus despainii
Historic Range...U.S.A. (UT)
Plant Family.....Cactaceae
Status...........E
When Listed......286
Critical Habitat.NA
Special Rule.....NA
Common Name......Santa Ana River woolly-star
Scientific Name..Eriastrum densifolium ssp. sanctorum
Historic Range...U.S.A. (CA)
Plant Family.....Polemoniaceae
Status...........E
When Listed......291
Critical Habitat.NA
Special Rule.....NA
Common Name......Santa Barbara Island liveforever
Scientific Name..Dudleya traskiae
Historic Range...U.S.A. (CA)
Plant Family.....Crassulaceae
Status...........E
When Listed......39
Critical Habitat.NA
Special Rule.....NA
Common Name......Santa Cruz cypress
Scientific Name..Cupressus abramsiana
Historic Range...U.S.A. (CA)
Plant Family.....Cupressaceae
Status...........E
When Listed......252
Critical Habitat.NA
Special Rule.....NA
Common Name......Seablite, California
Scientific Name..Suaeda californica
Historic Range...U.S.A. (CA)
Plant Family.....Chenopodiaceae
Status...........E
When Listed......567
Critical Habitat.NA
Special Rule.....NA
Common Name......Sebastopol meadowfoam
Scientific Name..Limnanthes vinculans
Historic Range...U.S.A. (CA)
Plant Family.....Limnanthaceae
Status...........E
When Listed......453
Critical Habitat.NA
Special Rule.....NA
Common Name......Sentry milk-vetch
Scientific Name..Astragalus cremnophylax var. cremnophylax
Historic Range...U.S.A. (AZ)
Plant Family.....Fabaceae
Status...........E
When Listed......409
Critical Habitat.NA
Special Rule.....NA
Common Name......Shrubby reed-mustard (=toad-flax cress)
Scientific Name..Schoenocrambe suffrutescens (=Glaucocarpum s.)
Historic Range...U.S.A. (UT)
Plant Family.....Brassicaceae
Status...........E
When Listed......293
Critical Habitat.NA
Special Rule.....NA
Common Name......Siler pincushion cactus
Scientific Name..Pediocactus sileri (=Echinocactus s., Utahia s.)
Historic Range...U.S.A. (AZ, UT)
Plant Family.....Cactaceae
Status...........T
When Listed......64, 524
Critical Habitat.NA
Special Rule.....NA
Common Name......Slender rush-pea
Scientific Name..Hoffmannseggia tenella
Historic Range...U.S.A. (TX)
Plant Family.....Fabaceae
Status...........E
When Listed......209
Critical Habitat.NA
Special Rule.....NA
Common Name......Slender-horned spineflower
Scientific Name..Dodecahema leptoceras (=Centrostegia l.)
Historic Range...U.S.A. (CA)
Plant Family.....Polygonaceae
Status...........E
When Listed......291
Critical Habitat.NA
Special Rule.....NA
Common Name......Slender-petaled mustard
Scientific Name..Thelypodium stenopetalum
Historic Range...U.S.A. (CA)
Plant Family.....Brassicaceae
Status...........E
When Listed......158
Critical Habitat.NA
Special Rule.....NA
Common Name......Sneed pincushion cactus
Scientific Name..Coryphantha sneedii var. sneedii (=Escobaria s., Mammillaria s.)
Historic Range...U.S.A. (NM, TX)
Plant Family.....Cactaceae
Status...........E
When Listed......82
Critical Habitat.NA
Special Rule.....NA
Common Name......Solano grass
Scientific Name..Tuctoria mucronata (=Orcuttia m.)
Historic Range...U.S.A. (CA)
Plant Family.....Poaceae
Status...........E
When Listed......44
Critical Habitat.NA
Special Rule.....NA
Common Name......Sonoma spineflower
Scientific Name..Chorizanthe valida
Historic Range...U.S.A. (CA)
Plant Family.....Polygonaceae
Status...........E
When Listed......472
Critical Habitat.NA
Special Rule.....NA
Common Name......Sonoma sunshine (=Baker's stickyseed)
Scientific Name..Blennosperma bakeri
Historic Range...U.S.A. (CA)
Plant Family.....Asteraceae
Status...........E
When Listed......453
Critical Habitat.NA
Special Rule.....NA
Common Name......South Texas ambrosia
Scientific Name..Ambrosia cheiranthifolia
Historic Range...U.S.A. (TX)
Plant Family.....Asteraceae
Status...........E
When Listed......547
Critical Habitat.NA
Special Rule.....NA
Common Name......Spineflower, Ben Lomond
Scientific Name..Chorizanthe pungens var. hartwegiana
Historic Range...U.S.A. (CA)
Plant Family.....Polygonaceae
Status...........E
When Listed......528
Critical Habitat.NA
Special Rule.....NA
Common Name......Spineflower, Monterey
Scientific Name..Chorizanthe pungens var. pungens
Historic Range...U.S.A. (CA)
Plant Family.....Polygonaceae
Status...........T
When Listed......528
Critical Habitat.NA
Special Rule.....NA
Common Name......Spineflower, Robust (incl. Scotts Valley)
Scientific Name..Chorizanthe robusta (incl. vars. robusta & hartwegii)
Historic Range...U.S.A. (CA)
Plant Family.....Polygonaceae
Status...........E
When Listed......528
Critical Habitat.NA
Special Rule.....NA
Common Name......Spring-loving centaury
Scientific Name..Centaurium namophilum
Historic Range...U.S.A. (CA, NV)
Plant Family.....Gentianaceae
Status...........T
When Listed......181
Critical Habitat.17.96(a)
Special Rule.....NA
Common Name......Star cactus
Scientific Name..Astrophytum asterias (=Echinocactus a.)
Historic Range...U.S.A. (TX), Mexico
Plant Family.....Cactaceae
Status...........E
When Listed......521
Critical Habitat.NA
Special Rule.....NA
Common Name......Steamboat buckwheat
Scientific Name..Eriogonum ovalifolium var. williamsiae
Historic Range...U.S.A. (NV)
Plant Family.....Polygonaceae
Status...........E
When Listed......237
Critical Habitat.NA
Special Rule.....NA
Common Name......Terlingua Creek cats-eye
Scientific Name..Cryptantha crassipes
Historic Range...U.S.A. (TX)
Plant Family.....Boraginaceae
Status...........E
When Listed......439
Critical Habitat.NA
Special Rule.....NA
Common Name......Texas ayenia
Scientific Name..Ayenia limitaris
Historic Range...U.S.A. (TX), Mexico
Plant Family.....Sterculiaceae
Status...........E
When Listed......547
Critical Habitat.NA
Special Rule.....NA
Common Name......Texas poppy-mallow
Scientific Name..Callirhoe scabriuscula
Historic Range...U.S.A. (TX)
Plant Family.....Malvaceae
Status...........E
When Listed......109, 112
Critical Habitat.NA
Special Rule.....NA
Common Name......Texas prairie dawn-flower (=Texas bitterweed)
Scientific Name..Hymenoxys texana
Historic Range...U.S.A. (TX)
Plant Family.....Asteraceae
Status...........E
When Listed......218
Critical Habitat.NA
Special Rule.....NA
Common Name......Texas snowbells
Scientific Name..Styrax texana
Historic Range...U.S.A. (TX)
Plant Family.....Styracaceae
Status...........E
When Listed......162
Critical Habitat.NA
Special Rule.....NA
Common Name......Texas trailing phlox
Scientific Name..Phlox nivalis ssp. texensis
Historic Range...U.S.A. (TX)
Plant Family.....Polemoniaceae
Status...........E
When Listed......440
Critical Habitat.NA
Special Rule.....NA
Common Name......Texas wild-rice
Scientific Name..Zizania texana
Historic Range...U.S.A. (TX)
Plant Family.....Poaceae
Status...........E
When Listed......39
Critical Habitat.17.96(a)
Special Rule.....NA
Common Name......Thistle, Chorro Creek bog
Scientific Name..Cirsium fontinale var. obispoense
Historic Range...U.S.A. (CA)
Plant Family.....Asteraceae
Status...........E
When Listed......567
Critical Habitat.NA
Special Rule.....NA
Common Name......Tobusch fishhook cactus
Scientific Name..Ancistrocactus tobuschii (=Echinocactus t., Mammillaria t.)
Historic Range...U.S.A. (TX)
Plant Family.....Cactaceae
Status...........E
When Listed......80
Critical Habitat.NA
Special Rule.....NA
Common Name......Todsen's pennyroyal
Scientific Name..Hedeoma todsenii
Historic Range...U.S.A. (NM)
Plant Family.....Lamiaceae
Status...........E
When Listed......110, 112
Critical Habitat.17.96(a)
Special Rule.....NA
Common Name......Truckee barberry
Scientific Name..Berberis sonnei (=Mahonia s.)
Historic Range...U.S.A. (CA)
Plant Family.....Berberidaceae
Status...........E
When Listed......76
Critical Habitat.NA
Special Rule.....NA
Common Name......Uinta Basin hookless cactus
Scientific Name..Sclerocactus glaucus (=Echinocactus g., E. subglaucus, E. whipplei var. g., Pediocactus g., S. franklinii, S.
Historic Range...U.S.A. (CO, UT)
Plant Family.....Cactaceae
Status...........T
When Listed......59
Critical Habitat.NA
Special Rule.....NA
Common Name......Ute ladies'-tresses
Scientific Name..Spiranthes diluvialis
Historic Range...U.S.A. (CO, NV, UT)
Plant Family.....Orchidaceae
Status...........T
When Listed......458
Critical Habitat.NA
Special Rule.....NA
Common Name......Walker's manioc
Scientific Name..Manihot walkerae
Historic Range...U.S.A. (TX), Mexico
Plant Family.....Euphorbiaceae
Status...........E
When Listed......445
Critical Habitat.NA
Special Rule.....NA
Common Name......Wallflower, Ben Lomond
Scientific Name..Erysimum teretifolium
Historic Range...U.S.A. (CA)
Plant Family.....Brassicacae
Status...........E
When Listed......528
Critical Habitat.NA
Special Rule.....NA
Common Name......Welsh's milkweed
Scientific Name..Asclepias welshii
Historic Range...U.S.A. (AZ, UT)
Plant Family.....Asclepiadaceae
Status...........T
When Listed......295
Critical Habitat.17.96(a)
Special Rule.....NA
Common Name......Western lily
Scientific Name..Lilium occidental
Historic Range...U.S.A. (OR, CA)
Plant Family.....Liliaceae
Status...........E
When Listed......544
Critical Habitat.NA
Special Rule.....NA
Common Name......White bladderpod
Scientific Name..Lesquerella pallida
Historic Range...U.S.A. (TX)
Plant Family.....Brassicaceae
Status...........E
When Listed......260
Critical Habitat.NA
Special Rule.....NA
Common Name......Wright fishhook cactus
Scientific Name..Sclerocactus wrightiae (=Pediocactus w.)
Historic Range...U.S.A. (UT)
Plant Family.....Cactaceae
Status...........E
When Listed......58
Critical Habitat.NA
Special Rule.....NA
Common Name......Zuni (=Rhizome) fleabane
Scientific Name..Erigeron rhizomatus
Historic Range...U.S.A. (NM)
Plant Family.....Asteraceae
Status...........T
When Listed......177
Critical Habitat.NA
Special Rule.....NA
Modified / 13 March 1995
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