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CNPS Rare Plant Inventory


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105 matches found. Click on scientific name for details

Search Criteria: Common Name starts with W

Scientific Name Common Name Family Lifeform Blooming Period Fed List State List Global Rank State Rank CA Rare Plant Rank Other Status Threats General Habitats Microhabitats Lowest Elevation (m) Highest Elevation (m) Lowest Elevation (ft) Highest Elevation (ft) CA Endemic Date Added Photo
Arctostaphylos viridissima white-haired manzanita Ericaceae perennial evergreen shrub May-Mar None None G4 S4 4.2 SB_SBBG Chaparral, Closed-cone coniferous forest Rocky, Shale (usually) 100 500 330 1640 Yes 1980-01-01
No Photo Available
Arabis aculeolata Waldo rockcress Brassicaceae perennial herb Apr-Jun None None G4 S2 2B.2 SB_BerrySB Erosion/runoff, Logging Broadleafed upland forest, Lower montane coniferous forest, Upper montane coniferous forest Serpentine 410 1800 1345 5905 1980-01-01 Photo of Arabis aculeolata
© 2020 John Doyen
Arctomecon merriamii white bear poppy Papaveraceae perennial herb (Mar)Apr-May None None G3 S3 2B.2 SB_CalBG/RSABG Erosion/runoff, Foot traffic/trampling, Grazing, Military operations, Mining, Non-native animal impacts, Non-native plant impacts, ORV activity, Other, Road/trail construction/maint. Chenopod scrub, Mojavean desert scrub Rocky 490 1800 1610 5905 1980-01-01 Photo of Arctomecon merriamii
© 2010 James M. Andre
Ceanothus verrucosus wart-stemmed ceanothus Rhamnaceae perennial evergreen shrub Dec-May None None G2 S2? 2B.2 SB_CalBG/RSABG; SB_CRES; SB_UCBG Agriculture, Dam/Inundation, Development, Foot traffic/trampling, Improper burning regime, Mining, Non-native plant impacts, Other, Road/trail construction/maint., Vandalism/dumping/litter, Wood cutting or brush clearing Chaparral, Coastal scrub 1 380 5 1245 1974-01-01 Photo of Ceanothus verrucosus
© Rick York and CNPS
Eriogonum pendulum Waldo wild buckwheat Polygonaceae perennial herb Aug-Sep None None G4 S2S3 2B.2 Erosion/runoff, Improper burning regime, Mining, Road/trail construction/maint. Lower montane coniferous forest, Upper montane coniferous forest Serpentine 230 1000 755 3280 1974-01-01 Photo of Eriogonum pendulum
© 2021 Scot Loring
Limnanthes floccosa ssp. floccosa woolly meadowfoam Limnanthaceae annual herb Mar-May(Jun) None None G4T4 S3 4.2 SB_UCBG Altered flood/tidal/hydrologic regime, Dam/Inundation, Development, Grazing, Logging, ORV activity, Other, Road/trail construction/maint., Vandalism/dumping/litter, Wood cutting or brush clearing Chaparral, Cismontane woodland, Valley and foothill grassland, Vernal pools Vernally Mesic 60 1335 195 4380 1980-01-01 Photo of Limnanthes floccosa ssp. floccosa
© 2021 Scot Loring
Smithiastrum wilkinsianum Wilkin's harebell Campanulaceae perennial rhizomatous herb Jul-Sep None None G2 S2 1B.2 SB_CalBG/RSABG; USFS_S Altered flood/tidal/hydrologic regime, Development, Erosion/runoff, Foot traffic/trampling, Grazing, Logging, Non-native plant impacts, Recreational use (non-ORV), Road/trail construction/maint., Surface water diversion Meadows and seeps, Subalpine coniferous forest, Upper montane coniferous forest 1270 2600 4165 8530 Yes 1974-01-01 Photo of Smithiastrum wilkinsianum
©2010 Eric White
Draba pterosperma winged-seed draba Brassicaceae perennial herb Jun-Aug None None G3 S3 4.3 Upper montane coniferous forest (often carbonate, gravelly, rocky) 1800 2500 5905 8205 Yes 1974-01-01 Photo of Draba pterosperma
©2016 Dana York
Astragalus ertterae Walker Pass milk-vetch Fabaceae perennial herb Apr-May None None G2 S2 1B.3 BLM_S; SB_CalBG/RSABG; USFS_S Foot traffic/trampling, Grazing, Recreational use (non-ORV), Road/trail construction/maint. Pinyon and juniper woodland (granitic, sandy) 1705 1900 5595 6235 Yes 1988-01-01
No Photo Available
Astragalus webberi Webber's milk-vetch Fabaceae perennial herb May-Jul None None G1 S1 1B.2 SB_UCSC; USFS_S Logging, Mining, Non-native plant impacts, ORV activity, Other, Recreational use (non-ORV), Road/trail construction/maint., Vandalism/dumping/litter, Wood cutting or brush clearing Broadleafed upland forest, Lower montane coniferous forest, Meadows and seeps 731 1250 2400 4100 Yes 1974-01-01
No Photo Available
Benitoa occidentalis western lessingia Asteraceae annual herb May-Nov None None G3G4 S3S4 4.3 Chaparral, Cismontane woodland, Coastal scrub, Valley and foothill grassland Clay (sometimes), Serpentine (sometimes) 450 1070 1475 3510 Yes 1974-01-01
No Photo Available
Carex lasiocarpa woolly-fruited sedge Cyperaceae perennial rhizomatous herb Jun-Jul None None G5 S2 2B.3 IUCN_LC Altered flood/tidal/hydrologic regime, Grazing, Logging, Recreational use (non-ORV) Bogs and fens, Marshes and swamps (freshwater, lake margins) 1700 2100 5580 6890 1980-01-01 Photo of Carex lasiocarpa
© 2011 Sierra Pacific Industries
Myriopteris wootonii Wooton's lace fern Pteridaceae perennial rhizomatous herb May-Oct None None G5 S2 2B.3 Joshua tree "woodland", Pinyon and juniper woodland Rocky 1600 1900 5250 6235 1980-01-01 Photo of Myriopteris wootonii
© 2019 Zoya Akulova
Chorizanthe wheeleri Wheeler's spineflower Polygonaceae annual herb Apr-Jul None None G3G4 S3S4 4.3 Chaparral, Coastal scrub, Valley and foothill grassland Gravelly (sometimes), Rocky (sometimes) 5 600 15 1970 Yes 1974-01-01
No Photo Available
Clarkia amoena ssp. whitneyi Whitney's farewell-to-spring Onagraceae annual herb Jun-Aug None None G5T1 S1 1B.1 SB_CalBG/RSABG; SB_UCBG Agriculture, Development, Grazing Coastal bluff scrub, Coastal scrub 10 100 35 330 Yes 1980-01-01
No Photo Available
Croton wigginsii Wiggins' croton Euphorbiaceae perennial shrub Mar-May None CR G2G3 S2 2B.2 BLM_S; SB_CalBG/RSABG Development, Non-native plant impacts, ORV activity, Other Desert dunes, Sonoran desert scrub (sandy) 50 100 165 330 1974-01-01
No Photo Available
Johnstonella holoptera winged cryptantha Boraginaceae annual herb Mar-Apr None None G4G5 S4 4.3 Mojavean desert scrub, Sonoran desert scrub 100 1690 330 5545 1980-01-01
No Photo Available
Dichondra occidentalis western dichondra Convolvulaceae perennial rhizomatous herb (Jan)Mar-Jul None None G3G4 S3S4 4.2 Chaparral, Cismontane woodland, Coastal scrub, Valley and foothill grassland 50 500 165 1640 1974-01-01
No Photo Available
Dirca occidentalis western leatherwood Thymelaeaceae perennial deciduous shrub Jan-Mar(Apr) None None G2 S2 1B.2 SB_CalBG/RSABG Development, Erosion/runoff, Foot traffic/trampling, Grazing, Insufficient population/stand size, Logging, Non-native plant impacts, Other, Recreational use (non-ORV), Road/trail construction/maint., Vandalism/dumping/litter, Waterway bank protection/maintenance, Wood cutting or brush clearing Broadleafed upland forest, Chaparral, Cismontane woodland, Closed-cone coniferous forest, North Coast coniferous forest, Riparian forest, Riparian woodland Mesic 25 425 80 1395 Yes 1974-01-01 Photo of Dirca occidentalis
© 2017 Steve Matson
Erigeron bloomeri var. nudatus Waldo daisy Asteraceae perennial herb Jun-Jul None None G5T4 S3 2B.3 Lower montane coniferous forest, Upper montane coniferous forest Serpentine 600 2300 1970 7545 1980-01-01 Photo of Erigeron bloomeri var. nudatus
©2020 John Doyen
Suaeda occidentalis western seablite Chenopodiaceae annual herb Jul-Sep None None G5 S2 2B.3 Great Basin scrub (alkaline, mesic) 1200 1500 3935 4920 2001-01-01 Photo of Suaeda occidentalis
©2016 Steve Matson
Potamogeton praelongus white-stemmed pondweed Potamogetonaceae perennial rhizomatous herb (aquatic) Jul-Aug None None G5 S2 2B.3 IUCN_LC Marshes and swamps (lakes, deep water) 1800 3000 5905 9845 1994-01-01 Photo of Potamogeton praelongus
©2011 Sierra Pacific Industries
Lessingia glandulifera var. tomentosa Warner Springs lessingia Asteraceae annual herb Aug-Oct None None G4?T2 S2 1B.1 BLM_S; USFS_S Grazing, Road/trail construction/maint. Chaparral (sandy) 870 1220 2855 4005 Yes 1980-01-01 Photo of Lessingia glandulifera var. tomentosa
© 2014 Keir Morse
Piperia candida white-flowered rein orchid Orchidaceae perennial herb (Mar-Apr)May-Sep None None G3? S3 1B.2 SB_CalBG/RSABG Altered flood/tidal/hydrologic regime, Development, Erosion/runoff, Foot traffic/trampling, Grazing, Improper burning regime, Logging, Mining, Non-native plant impacts, ORV activity, Other, Recreational use (non-ORV), Road/trail construction/maint., Vandalism/dumping/litter Broadleafed upland forest, Lower montane coniferous forest, North Coast coniferous forest Serpentine (sometimes) 30 1310 100 4300 1994-01-01 Photo of Piperia candida
©2016 Barry Rice
Eriogonum eremicola Wildrose Canyon buckwheat Polygonaceae annual herb Jun-Sep None None G1 S1 1B.3 BLM_S; SB_CalBG/RSABG Erosion/runoff, Foot traffic/trampling, Mining, Road/trail construction/maint. Pinyon and juniper woodland, Upper montane coniferous forest Gravelly (sometimes), Sandy (sometimes) 2200 3100 7220 10170 Yes 1974-01-01
No Photo Available
Eriogonum umbellatum var. glaberrimum Warner Mountains buckwheat Polygonaceae perennial herb Jun-Sep None None G5T2? S2 1B.3 SB_UCSC; USFS_S Erosion/runoff, Foot traffic/trampling, Grazing, Logging, ORV activity, Recreational use (non-ORV), Road/trail construction/maint. Great Basin scrub, Lower montane coniferous forest, Upper montane coniferous forest Gravelly (sometimes), Sandy (sometimes) 1525 2405 5005 7890 1988-01-01 Photo of Eriogonum umbellatum var. glaberrimum
©2007 F. Gauna
Galium serpenticum ssp. warnerense Warner Mountains bedstraw Rubiaceae perennial rhizomatous herb Jun-Jul None None G4G5T2T3 S2 1B.2 SB_UCSC; USFS_S Erosion/runoff, Grazing, Non-native plant impacts, ORV activity, Recreational use (non-ORV), Road/trail construction/maint. Meadows and seeps, Pinyon and juniper woodland, Subalpine coniferous forest Rocky, Talus 1450 2750 4755 9025 1984-01-01 Photo of Galium serpenticum ssp. warnerense
©2021 Scot Loring
Galium wrightii Wright's bedstraw Rubiaceae perennial herb Jun-Oct None None G5 S3 2B.3 Lower montane coniferous forest, Pinyon and juniper woodland Carbonate, Rocky 1600 2000 5250 6560 1974-01-01
No Photo Available
Hibiscus lasiocarpos var. occidentalis woolly rose-mallow Malvaceae perennial rhizomatous herb (emergent) Jun-Sep None None G5T3 S3 1B.2 SB_CalBG/RSABG; SB_UCBG Agriculture, Altered flood/tidal/hydrologic regime, Biocides, Dam/Inundation, Degraded water quality, Development, Erosion/runoff, Foot traffic/trampling, Grazing, Improper burning regime, Mining, Non-native plant impacts, ORV activity, Other, Recreational use (non-ORV), Road/trail construction/maint., Surface water diversion, Waterway bank protection/maintenance, Wood cutting or brush clearing Marshes and swamps (freshwater) 0 120 0 395 Yes 1974-01-01 Photo of Hibiscus lasiocarpos var. occidentalis
© 2020 Steven Perry
Horkelia hispidula White Mountains horkelia Rosaceae perennial herb Jun-Aug None None G3 S3 1B.3 SB_CalBG/RSABG; USFS_S Foot traffic/trampling, Grazing, Other, Road/trail construction/maint. Alpine dwarf scrub, Great Basin scrub, Subalpine coniferous forest 3000 3400 9845 11155 1974-01-01 Photo of Horkelia hispidula
© 2012 Steve Matson
Howellia aquatilis water howellia Campanulaceae annual herb (aquatic) Jun FD None G3 S2 2B.2 Foot traffic/trampling, Non-native plant impacts, Other Marshes and swamps (freshwater) 1085 1290 3560 4230 1974-01-01 Photo of Howellia aquatilis
©2018 John Doyen
Ivesia webberi Webber's ivesia Rosaceae perennial herb May-Jul FT None G2 S1 1B.1 SB_CalBG/RSABG; USFS_S Agriculture, Dam/Inundation, Development, Foot traffic/trampling, Grazing, Improper burning regime, Logging, Non-native plant impacts, ORV activity, Other, Recreational use (non-ORV), Road/trail construction/maint. Great Basin scrub (volcanic ash), Lower montane coniferous forest, Pinyon and juniper woodland Gravelly (sometimes), Sandy (sometimes) 1000 2075 3280 6810 1974-01-01 Photo of Ivesia webberi
© 2007 Steve Matson
Lilium occidentale western lily Liliaceae perennial bulbiferous herb Jun-Jul FE CE G1G2 S1 1B.1 SB_BerrySB Development, Foot traffic/trampling, Grazing, ORV activity, Other, Over-collecting/poaching, Road/trail construction/maint. Bogs and fens, Coastal bluff scrub, Coastal prairie, Coastal scrub, Marshes and swamps (freshwater), North Coast coniferous forest (openings) 2 185 5 605 1974-01-01 Photo of Lilium occidentale
© 2018 Jason Matthias Mills
Lilium pardalinum ssp. wigginsii Wiggins' lily Liliaceae perennial bulbiferous herb Jun-Aug None None G5T3 S3 4.3 Bogs and fens, Broadleafed upland forest, Lower montane coniferous forest, Meadows and seeps, Riparian scrub Mesic 485 2000 1590 6560 1974-01-01 Photo of Lilium pardalinum ssp. wigginsii
© 2016 Dana York
Malaxis monophyllos var. brachypoda white bog adder's-mouth Orchidaceae perennial bulbiferous herb Jun-Aug None None G5T4T5 S1 2B.1 USFS_S Foot traffic/trampling, Grazing, Recreational use (non-ORV) Bogs and fens, Meadows and seeps, Upper montane coniferous forest Mesic 2200 2743 7220 9000 1974-01-01
No Photo Available
Monardella viminea willowy monardella Lamiaceae perennial herb Jun-Aug FE CE G1 S1 1B.1 Altered flood/tidal/hydrologic regime, Channelization, Development, Erosion/runoff, Foot traffic/trampling, Grazing, Improper burning regime, Mining, Non-native plant impacts, ORV activity, Other, Recreational use (non-ORV), Road/trail construction/maint., Vandalism/dumping/litter, Wood cutting or brush clearing Chaparral, Coastal scrub, Riparian forest, Riparian scrub, Riparian woodland Alluvial Terraces, Washes 50 225 165 740 Yes 1980-01-01 Photo of Monardella viminea
© 2015 Keir Morse
Oenothera wolfii Wolf's evening-primrose Onagraceae perennial herb May-Oct None None G2 S1 1B.1 SB_BerrySB Altered flood/tidal/hydrologic regime, Biocides, Development, Erosion/runoff, Foot traffic/trampling, Hybridization, Landfill, Non-native plant impacts, ORV activity, Other, Recreational use (non-ORV), Road/trail construction/maint., Vandalism/dumping/litter, Wood cutting or brush clearing Coastal bluff scrub, Coastal dunes, Coastal prairie, Lower montane coniferous forest Mesic (usually), Sandy 3 800 10 2625 1980-01-01 Photo of Oenothera wolfii
©2017 Dana York
Opuntia wigginsii Wiggins' cholla Cactaceae perennial stem Mar None None G3?Q S1? 3.3 Road/trail construction/maint. Sonoran desert scrub (sandy) 30 885 100 2905 1974-01-01
No Photo Available
Oreonana vestita woolly mountain-parsley Apiaceae perennial herb Mar-Sep None None G3 S3 1B.3 BLM_S; SB_CalBG/RSABG; USFS_S Development, Erosion/runoff, Foot traffic/trampling, Over-collecting/poaching, Recreational use (non-ORV), Road/trail construction/maint. Lower montane coniferous forest, Subalpine coniferous forest, Upper montane coniferous forest Gravelly (sometimes), Talus (sometimes) 1615 3500 5300 11485 Yes 1974-01-01
No Photo Available
Sidotheca emarginata white-margined oxytheca Polygonaceae annual herb (Feb)Apr-Jul(Aug) None None G3 S3 1B.3 SB_CalBG/RSABG; SB_USDA; USFS_S Foot traffic/trampling Chaparral, Lower montane coniferous forest, Pinyon and juniper woodland 1200 2500 3935 8205 Yes 1980-01-01
No Photo Available
Oxytheca watsonii Watson's oxytheca Polygonaceae annual herb May-Jul None None G3? S1 2B.2 Grazing, ORV activity, Recreational use (non-ORV) Joshua tree "woodland", Mojavean desert scrub Sandy 1200 2000 3935 6560 1980-01-01
No Photo Available
Penstemon albomarginatus white-margined beardtongue Plantaginaceae perennial herb Mar-May(Jun) None None G2 S1 1B.1 BLM_S; SB_CalBG/RSABG Development, Erosion/runoff, Military operations, Mining, Non-native plant impacts, ORV activity, Other, Recreational use (non-ORV), Road/trail construction/maint., Vandalism/dumping/litter Desert dunes (stabilized), Mojavean desert scrub (sandy) 620 1065 2035 3495 1988-01-01 Photo of Penstemon albomarginatus
Michelle Cloud-Hughes 2010
Pentachaeta bellidiflora white-rayed pentachaeta Asteraceae annual herb Mar-May FE CE G1 S1 1B.1 SB_UCBG Non-native plant impacts, ORV activity, Other, Recreational use (non-ORV), Vandalism/dumping/litter Cismontane woodland, Valley and foothill grassland (often serpentinite) 35 620 115 2035 Yes 1974-01-01
No Photo Available
Stenotus lanuginosus var. lanuginosus woolly stenotus Asteraceae perennial herb May-Jul None None G5T5 S3 2B.2 BLM_S Altered flood/tidal/hydrologic regime, Foot traffic/trampling, Grazing, Improper burning regime, Logging, Mining, Non-native plant impacts, ORV activity Great Basin scrub, Meadows and seeps, Pinyon and juniper woodland Gravelly, Loam 1500 1930 4920 6330 1994-01-01
No Photo Available
Lessingia hololeuca woolly-headed lessingia Asteraceae annual herb Jun-Oct None None G2G3 S2S3 3 Broadleafed upland forest, Coastal scrub, Lower montane coniferous forest, Valley and foothill grassland Clay, Serpentine 15 305 50 1000 Yes 1994-01-01 Photo of Lessingia hololeuca
© 2015 Aaron Schusteff
Rumex venosus winged dock Polygonaceae perennial herb (Apr)May-Jun None None G5? S3 2B.3 Grazing, Other Great Basin scrub (sandy) 1200 1800 3935 5905 2001-01-01
No Photo Available
Rhynchospora alba white beaked-rush Cyperaceae perennial rhizomatous herb Jun-Aug None None G5 S2 2B.2 IUCN_LC Altered flood/tidal/hydrologic regime, Biocides, Foot traffic/trampling, Grazing, Non-native plant impacts, ORV activity, Other, Vandalism/dumping/litter Bogs and fens, Marshes and swamps (freshwater), Meadows and seeps 60 2040 195 6695 1974-01-01 Photo of Rhynchospora alba
© 2021 Scot Loring
Ribes hudsonianum var. petiolare western black currant Grossulariaceae perennial deciduous shrub May-Jul None None G5T5 S2 2B.3 Recreational use (non-ORV), Road/trail construction/maint. Riparian scrub 1500 2230 4920 7315 1988-01-01
No Photo Available
Schoenoplectus subterminalis water bulrush Cyperaceae perennial rhizomatous herb (aquatic) Jun-Aug(Sep) None None G5 S3 2B.3 IUCN_LC Altered flood/tidal/hydrologic regime, Degraded water quality, Grazing, Logging, Other, Recreational use (non-ORV), Surface water diversion, Vandalism/dumping/litter Bogs and fens, Marshes and swamps (montane lake margins) 750 2250 2460 7380 1980-01-01 Photo of Schoenoplectus subterminalis
Dean Wm. Taylor (1996)
Solanum wallacei Wallace's nightshade Solanaceae perennial herb Mar-Aug None None G3Q S2 1B.1 SB_CalBG/RSABG Grazing, Non-native animal impacts Chaparral, Cismontane woodland Rocky 3 410 10 1345 1974-01-01
No Photo Available
Trichocoronis wrightii var. wrightii Wright's trichocoronis Asteraceae annual herb May-Sep None None G4T3 S1 2B.1 Agriculture, Grazing Marshes and swamps, Meadows and seeps, Riparian forest, Vernal pools Alkaline 5 435 15 1425 1988-01-01
No Photo Available
Viola primulifolia ssp. occidentalis western white bog violet Violaceae perennial rhizomatous herb Apr-Sep None None G5T2 S2 1B.2 USFS_S Altered flood/tidal/hydrologic regime, Erosion/runoff, Foot traffic/trampling, Improper burning regime, Logging, ORV activity, Other, Road/trail construction/maint., Vandalism/dumping/litter Bogs and fens (serpentinite), Marshes and swamps 100 990 330 3250 1980-01-01 Photo of Viola primulifolia ssp. occidentalis
©2003 Norman Jensen
Antennaria marginata white-margined everlasting Asteraceae perennial stoloniferous herb May-Aug None None G4G5 S1 2B.3 USFS_S Foot traffic/trampling Lower montane coniferous forest, Upper montane coniferous forest 2120 3353 6955 11000 1994-01-01 Photo of Antennaria marginata
© 2010 Duncan S. Bell
Balsamorhiza lanata woolly balsamroot Asteraceae perennial herb Apr-Jun None None G3 S3 1B.2 BLM_S; SB_CalBG/RSABG Agriculture, Biocides, Development, Grazing, Logging, Mining, Non-native plant impacts, ORV activity, Road/trail construction/maint., Vandalism/dumping/litter Cismontane woodland Rocky, Volcanic 800 1895 2625 6215 1994-01-01 Photo of Balsamorhiza lanata
© 2015 John Doyen
Botrychium montanum western goblin Ophioglossaceae perennial rhizomatous herb Jul-Sep None None G3G4 S2 2B.1 USFS_S Altered flood/tidal/hydrologic regime, Erosion/runoff, Foot traffic/trampling, Grazing, Logging, Non-native plant impacts, ORV activity, Other, Recreational use (non-ORV), Road/trail construction/maint., Surface water diversion, Wood cutting or brush clearing Lower montane coniferous forest, Meadows and seeps, Upper montane coniferous forest Mesic 1465 2180 4805 7155 1994-01-01 Photo of Botrychium montanum
©2012 Belinda Lo
Canbya candida white pygmy-poppy Papaveraceae annual herb Mar-Jun None None G3G4 S3S4 4.2 SB_CalBG/RSABG; USFS_S Agriculture, Development, ORV activity, Road/trail construction/maint. Joshua tree "woodland", Mojavean desert scrub, Pinyon and juniper woodland Granitic, Gravelly, Sandy 600 1460 1970 4790 Yes 1974-01-01
No Photo Available
Chorizanthe cuspidata var. villosa woolly-headed spineflower Polygonaceae annual herb May-Jul(Aug) None None G2T2 S2 1B.2 Agriculture, Development, Disking, Foot traffic/trampling, Grazing, Mining, Non-native plant impacts, Wood cutting or brush clearing Coastal dunes, Coastal prairie, Coastal scrub Sandy 3 60 10 195 Yes 1994-01-01
No Photo Available
Chorizanthe xanti var. leucotheca white-bracted spineflower Polygonaceae annual herb Apr-Jun None None G4T3 S3 1B.2 BLM_S; SB_CalBG/RSABG; SB_USDA; USFS_S Development, Grazing, Non-native plant impacts, ORV activity, Road/trail construction/maint. Coastal scrub (alluvial fans), Mojavean desert scrub, Pinyon and juniper woodland Gravelly (sometimes), Sandy (sometimes) 300 1200 985 3935 Yes 1994-01-01
No Photo Available
Clarkia gracilis ssp. albicaulis white-stemmed clarkia Onagraceae annual herb May-Jul None None G5T3 S3 1B.2 BLM_S; SB_UCBG; USFS_S Biocides, Erosion/runoff, Logging, Mining, Non-native plant impacts, Recreational use (non-ORV), Road/trail construction/maint., Vandalism/dumping/litter Chaparral, Cismontane woodland Serpentine (sometimes) 245 1085 805 3560 Yes 1994-01-01
No Photo Available
Draba monoensis White Mountains draba Brassicaceae perennial herb Aug None None G2 S2 1B.2 USFS_S Grazing Alpine boulder and rock field, Meadows and seeps 3000 3960 9845 12995 Yes 1994-01-01
No Photo Available
Eriogonum heermannii var. occidentale western Heermann's buckwheat Polygonaceae perennial deciduous shrub Jul-Oct None None G5T2 S2 1B.2 BLM_S; SB_UCSC Erosion/runoff, ORV activity Cismontane woodland (openings) Clay (rarely), Roadsides (usually), Serpentine (often), Shale (rarely), Slopes (rarely) 105 795 345 2610 Yes 1994-01-01
No Photo Available
Cylindropuntia wolfii Wolf's cholla Cactaceae perennial stem Mar-May None None G4 S3 4.3 IUCN_LC; SB_CRES Sonoran desert scrub 100 1200 330 3935 1994-01-01
No Photo Available
Suaeda taxifolia woolly seablite Chenopodiaceae perennial evergreen shrub Jan-Dec None None G4 S3S4 4.2 SB_CRES Coastal bluff scrub, Coastal dunes, Marshes and swamps (coastal margins) 0 50 0 165 1994-01-01
No Photo Available
Aloysia wrightii Wright's beebrush Verbenaceae perennial evergreen shrub Apr-Oct None None G5 S4 4.3 Joshua tree "woodland", Pinyon and juniper woodland Carbonate (often), Rocky 900 1600 2955 5250 2001-01-01 Photo of Aloysia wrightii
© 2010 James M. Andre
Amaranthus watsonii Watson's amaranth Amaranthaceae annual herb Apr-Sep None None G5? S3 4.3 SB_CalBG/RSABG Mojavean desert scrub, Sonoran desert scrub 20 1700 65 5580 2001-01-01 Photo of Amaranthus watsonii
© 2003 Debra Valov
Asplenium vespertinum western spleenwort Aspleniaceae perennial rhizomatous herb Feb-Jun None None G3? S4 4.2 Chaparral, Cismontane woodland, Coastal scrub Rocky 180 1000 590 3280 1974-01-01
No Photo Available
Astragalus whitneyi var. lenophyllus woolly-leaved milk-vetch Fabaceae perennial herb Jul-Aug None None G5T4 S4 4.3 Alpine boulder and rock field, Subalpine coniferous forest (rocky) 2135 3050 7005 10005 2001-01-01
No Photo Available
Carex atherodes wheat sedge Cyperaceae perennial rhizomatous herb Jun-Aug None None G5 S3 2B.2 IUCN_LC Grazing, Other, Road/trail construction/maint., Waterway bank protection/maintenance Marshes and swamps, Meadows and seeps, Pinyon and juniper woodland Mesic 1300 1540 4265 5055 2001-01-01 Photo of Carex atherodes
©2015 Dean Wm. Taylor
Carex occidentalis western sedge Cyperaceae perennial rhizomatous herb Jun-Aug None None G4 S3 2B.3 SB_CalBG/RSABG Lower montane coniferous forest, Meadows and seeps 1645 3135 5395 10285 2001-01-01
No Photo Available
Carex scirpoidea ssp. pseudoscirpoidea western single-spiked sedge Cyperaceae perennial rhizomatous herb Jul-Sep None None G5T5 S2 2B.2 ORV activity Alpine boulder and rock field, Meadows and seeps, Subalpine coniferous forest (rocky) Carbonate (often), Mesic 2990 3700 9810 12140 2001-01-01
No Photo Available
Carex vallicola western valley sedge Cyperaceae perennial rhizomatous herb Jul-Aug None None G4G5 S2 2B.3 Grazing Great Basin scrub, Meadows and seeps Mesic 1525 2805 5005 9205 2001-01-01
No Photo Available
Chaetadelpha wheeleri Wheeler's dune-broom Asteraceae perennial rhizomatous herb Apr-Sep None None G4 S2 2B.2 Development, Non-native plant impacts, ORV activity Desert dunes, Great Basin scrub, Mojavean desert scrub Sandy 795 1900 2610 6235 2001-01-01
No Photo Available
Ericameria albida white-flowered rabbitbrush Asteraceae perennial evergreen shrub Jun-Nov None None G4 S3 4.2 SB_CalBG/RSABG Chenopod scrub, Meadows and seeps, Playas Alkaline (sometimes) 300 1950 985 6400 2001-01-01
No Photo Available
Gilia capitata ssp. tomentosa woolly-headed gilia Polemoniaceae annual herb May-Jul None None G5T2 S2 1B.1 SB_CalBG/RSABG Erosion/runoff, Foot traffic/trampling, Grazing, Improper burning regime, Non-native plant impacts, Other, Road/trail construction/maint. Coastal bluff scrub, Valley and foothill grassland Rocky, Serpentine 10 220 35 720 Yes 2001-01-01 Photo of Gilia capitata ssp. tomentosa
© 2008 Vernon Smith
Hymenothrix wrightii Wright's hymenothrix Asteraceae perennial herb Jun-Oct None None G5 S3 4.3 SB_CRES Cismontane woodland, Lower montane coniferous forest, Valley and foothill grassland 1400 1550 4595 5085 2001-01-01
No Photo Available
Malacothrix foliosa ssp. crispifolia wavy-leaved malacothrix Asteraceae annual herb Mar-May(Jul) None None G4T1 S1 1B.2 Coastal scrub (rocky) 3 65 10 215 Yes 2001-01-01
No Photo Available
Moneses uniflora woodnymph Ericaceae perennial rhizomatous herb May-Aug None None G5 S2 2B.2 Road/trail construction/maint. Broadleafed upland forest, North Coast coniferous forest 100 1100 330 3610 2001-01-01 Photo of Moneses uniflora
©2021 Scot Loring
Polyctenium williamsiae Williams' combleaf Brassicaceae perennial herb Mar-Jul None None G2Q S1 1B.2 BLM_S; USFS_S Agriculture, Foot traffic/trampling, Grazing, Mining, Road/trail construction/maint., Surface water diversion Great Basin scrub, Marshes and swamps, Pinyon and juniper woodland, Playas, Vernal pools Lake Margins, Sandy, Volcanic 1347 2700 4420 8860 2001-01-01
No Photo Available
Spergularia canadensis var. occidentalis western sand-spurrey Caryophyllaceae annual herb Jun-Aug None None G5T4 S1 2B.1 Development, Foot traffic/trampling, Non-native plant impacts, ORV activity, Recreational use (non-ORV) Marshes and swamps (coastal salt) 0 3 0 10 2001-01-01
No Photo Available
Valeriana occidentalis western valerian Valerianaceae perennial rhizomatous herb Jun-Aug None None G5 S1 2B.3 Lower montane coniferous forest (mesic) 1500 1800 4920 5905 2001-01-01
No Photo Available
Erigeron oxyphyllus wand-like fleabane daisy Asteraceae perennial herb Apr-May None None G4 S2 2B.3 Sonoran desert scrub Dry, Rocky, Slopes, Washes 645 790 2115 2590 2006-03-30
No Photo Available
Subularia aquatica ssp. americana water awlwort Brassicaceae annual herb (aquatic) Jul-Sep None None G5T5 S4 4.3 Upper montane coniferous forest Lake Margins 1900 3100 6235 10170 2006-10-12
No Photo Available
Mentzelia pterosperma wing-seed blazing star Loasaceae annual/perennial herb Apr-Jun None None G4 S1S2 2B.2 SB_CalBG/RSABG; SB_USDA Altered flood/tidal/hydrologic regime, Grazing, Non-native plant impacts, ORV activity, Other, Road/trail construction/maint. Mojavean desert scrub Clay 1140 1140 3740 3740 2006-12-21
No Photo Available
Pseudognaphalium leucocephalum white rabbit-tobacco Asteraceae perennial herb (Jul)Aug-Nov(Dec) None None G4 S2 2B.2 Altered flood/tidal/hydrologic regime, Development, Erosion/runoff, Non-native plant impacts, Recreational use (non-ORV), Wood cutting or brush clearing Chaparral, Cismontane woodland, Coastal scrub, Riparian woodland Gravelly, Sandy 0 2100 0 6890 2006-11-03
No Photo Available
Packera hesperia western ragwort Asteraceae perennial herb Apr-Jun None None G3 S1 2B.2 USFS_S Improper burning regime, Logging, ORV activity Meadows and seeps, Upper montane coniferous forest Serpentine 500 2500 1640 8205 2007-04-12 Photo of Packera hesperia
©2008 Keir Morse
Pickeringia montana var. tomentosa woolly chaparral-pea Fabaceae evergreen shrub May-Aug None None G5T3T4 S3S4 4.3 SB_CRES Chaparral Clay, Gabbroic, Granitic 0 1700 0 5580 2007-02-07
No Photo Available
Silene occidentalis ssp. occidentalis Western campion Caryophyllaceae perennial herb Jun-Aug None None G4T3 S3 4.3 Chaparral, Lower montane coniferous forest, Upper montane coniferous forest Dry, Openings, Rocky (sometimes) 1030 2090 3380 6855 Yes 2010-03-04 Photo of Silene occidentalis ssp. occidentalis
©2011 Sierra Pacific Industries
Monolopia gracilens woodland woollythreads Asteraceae annual herb (Feb)Mar-Jul None None G3 S3 1B.2 SB_CalBG/RSABG Biocides, Development, Erosion/runoff, Foot traffic/trampling, Grazing, Insufficient population/stand size, Non-native plant impacts, Other, Recreational use (non-ORV), Road/trail construction/maint., Wood cutting or brush clearing Broadleafed upland forest (openings), Chaparral (openings), Cismontane woodland, North Coast coniferous forest (openings), Valley and foothill grassland Serpentine 100 1200 330 3935 Yes 2010-04-06 Photo of Monolopia gracilens
© 2016 Richard Spellenberg
Brasenia schreberi watershield Cabombaceae perennial rhizomatous herb (aquatic) Jun-Sep None None G5 S3 2B.3 IUCN_LC Altered flood/tidal/hydrologic regime, Development, Non-native plant impacts, Road/trail construction/maint. Marshes and swamps (freshwater) 0 2200 0 7220 2010-10-27 Photo of Brasenia schreberi
©2014 Kirsten Bovee
Drymocallis cuneifolia var. cuneifolia wedgeleaf woodbeauty Rosaceae perennial herb Jun-Aug None None G2T1 S1 1B.1 SB_CalBG/RSABG; SB_USDA; USFS_S ORV activity, Road/trail construction/maint. Riparian scrub, Upper montane coniferous forest Carbonate (sometimes) 1800 2415 5905 7925 Yes 2011-11-22
No Photo Available
Plagiobothrys verrucosus warty popcornflower Boraginaceae annual herb Apr-May None None G4G5 S1 2B.1 Chaparral Shale 610 760 2000 2495 2012-08-21
No Photo Available
Monardella hypoleuca ssp. hypoleuca white-veined monardella Lamiaceae perennial herb (Apr)May-Aug(Sep-Dec) None None G4T3 S3 1B.3 SB_SBBG Foot traffic/trampling Chaparral, Cismontane woodland 50 1525 165 5005 Yes 2013-01-03
No Photo Available
Cryptantha wigginsii Wiggins' cryptantha Boraginaceae annual herb Feb-Jun None None G2 S1 1B.2 Altered flood/tidal/hydrologic regime, Biocides, Development, Erosion/runoff, Foot traffic/trampling, Non-native plant impacts, Recreational use (non-ORV), Vandalism/dumping/litter Coastal scrub Clay (often) 20 275 65 900 2013-05-21
No Photo Available
Heteranthera dubia water star-grass Pontederiaceae perennial herb (aquatic) Jul-Oct None None G5 S2 2B.2 IUCN_LC Erosion/runoff, Recreational use (non-ORV) Marshes and swamps (alkaline, still, slow-moving water) Alkaline 30 1495 100 4905 2013-10-10 Photo of Heteranthera dubia
©2010 Louis-M. Landry
Peltigera gowardii western waterfan lichen Peltigeraceae foliose lichen (aquatic) None None G4? S3 4.2 USFS_S Altered flood/tidal/hydrologic regime, Dam/Inundation, Erosion/runoff, Logging, ORV activity, Other, Recreational use (non-ORV), Surface water diversion Riparian forest 1065 2620 3495 8595 2014-03-01 Photo of Peltigera gowardii
© 2021 Scot Loring
Texosporium sancti-jacobi woven-spored lichen Caliciaceae crustose lichen (terricolous) None None G3 S2 3 Chaparral (openings) 60 660 195 2165 2014-03-01 Photo of Texosporium sancti-jacobi
©2021 Scot Loring
Thamnolia vermicularis whiteworm lichen Icmadophilaceae fruticose lichen (terricolous) None None G5 S1 2B.1 Agriculture, Development, Foot traffic/trampling, Road/trail construction/maint. Chaparral, Valley and foothill grassland Rocky, Sandstone 90 90 295 295 2014-03-01 Photo of Thamnolia vermicularis
© 2021 Scot Loring
Jaffueliobryum wrightii Wright's jaffueliobryum moss Grimmiaceae moss None None G5 S2S3 2B.3 Alpine dwarf scrub, Mojavean desert scrub, Pinyon and juniper woodland Carbonate, Dry, Openings, Rock crevices 160 2500 525 8205 2014-05-15
No Photo Available
Plagiobryoides vinosula wine-colored tufa moss Bryaceae moss None None G3G4 S3S4 4.2 Cismontane woodland, Meadows and seeps, Mojavean desert scrub, Pinyon and juniper woodland, Riparian woodland Clay (sometimes), Granitic (usually), Seeps, Streambanks 30 1735 100 5695 2014-06-10
No Photo Available
Helianthus winteri Winter's sunflower Asteraceae perennial shrub Jan-Dec None None G2? S2? 1B.2 BLM_S; SB_CalBG/RSABG Agriculture, Foot traffic/trampling, Grazing, Non-native plant impacts, Recreational use (non-ORV), Road/trail construction/maint. Cismontane woodland, Valley and foothill grassland Granitic, Openings, Roadsides (often), Rocky (often), Slopes 125 460 410 1510 Yes 2014-10-15 Photo of Helianthus winteri
© 2014 Chris Winchell
Kallstroemia parviflora warty caltrop Zygophyllaceae annual herb Aug-Nov None None G5 S3 4.2 Joshua tree "woodland", Mojavean desert scrub, Pinyon and juniper woodland Disturbed areas (sometimes) 855 1705 2805 5595 2015-01-20 Photo of Kallstroemia parviflora
© 2019 Wynn Anderson
Spermolepis lateriflora western bristly scaleseed Apiaceae annual herb Mar-Apr None None G5 SH 2A Sonoran desert scrub Rocky (sometimes), Sandy (sometimes) 365 670 1200 2200 2016-01-21
No Photo Available
Funastrum crispum wavyleaf twinvine Apocynaceae perennial herb May-Aug None None G4 S1 2B.2 SB_CalBG/RSABG Altered flood/tidal/hydrologic regime, Development, Foot traffic/trampling, Non-native plant impacts, Over-collecting/poaching, Wood cutting or brush clearing Chaparral, Pinyon and juniper woodland 1165 1840 3820 6035 2016-12-29 Photo of Funastrum crispum
© 2016 Keir Morse
Catabrosa aquatica water whorlgrass Poaceae perennial stoloniferous herb Jul-Sep None None G5 S1 2B.1 Foot traffic/trampling, Grazing, ORV activity Meadows and seeps Streambanks 2018-12-12
No Photo Available
Lomatium kogholiini Wailaki lomatium Apiaceae perennial herb Apr-Jun None None G1 S1 1B.2 Lower montane coniferous forest Serpentine 450 1250 1475 4100 2023-06-13
No Photo Available

Suggested Citation:
California Native Plant Society, Rare Plant Program. 2024. Rare Plant Inventory (online edition, v9.5). Website https://www.rareplants.cnps.org [accessed 19 April 2024].