CNPS

CNPS Rare Plant Inventory


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83 matches found. Click on scientific name for details

Search Criteria: Common Name starts with R

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 refugioensis Refugio manzanita Ericaceae perennial evergreen shrub (May)Dec-Mar None None G3 S3 1B.2 SB_SBBG; USFS_S Development, Road/trail construction/maint., Wood cutting or brush clearing Chaparral (sandstone) 274 820 900 2690 Yes 1974-01-01
No Photo Available
Arctostaphylos stanfordiana ssp. raichei Raiche's manzanita Ericaceae perennial evergreen shrub Feb-Apr None None G3T2 S2 1B.1 BLM_S; SB_CalBG/RSABG; SB_USDA Mining, ORV activity, Road/trail construction/maint. Chaparral, Lower montane coniferous forest (openings) Rocky, Serpentine (often) 450 1035 1475 3395 Yes 1988-01-01
No Photo Available
Abronia alpina Ramshaw Meadows abronia Nyctaginaceae perennial herb Jul-Aug None None G2 S2 1B.1 USFS_S Recreational use (non-ORV) Meadows and seeps (granitic, gravelly margins) Granitic, Gravelly, Sandy 2400 2700 7875 8860 Yes 1974-01-01 Photo of Abronia alpina
© 2004 James M. Andre
Allium tuolumnense Rawhide Hill onion Alliaceae perennial bulbiferous herb Mar-May None None G2 S2 1B.2 BLM_S Altered flood/tidal/hydrologic regime, Development, Erosion/runoff, Foot traffic/trampling, Grazing, Improper burning regime, Mining, ORV activity, Other, Recreational use (non-ORV), Road/trail construction/maint., Vandalism/dumping/litter Cismontane woodland (serpentinite) 300 600 985 1970 Yes 1980-01-01 Photo of Allium tuolumnense
© 2010 Steven Perry
Arctostaphylos stanfordiana ssp. decumbens Rincon Ridge manzanita Ericaceae perennial evergreen shrub Feb-Apr(May) None None G3T1 S1 1B.1 SB_UCSC Agriculture, Development, Mining, Non-native plant impacts, ORV activity, Other, Road/trail construction/maint., Vandalism/dumping/litter, Wood cutting or brush clearing Chaparral (rhyolitic), Cismontane woodland 75 370 245 1215 Yes 1984-01-01
No Photo Available
Collomia rawsoniana Rawson's flaming trumpet Polemoniaceae perennial rhizomatous herb Jul-Aug None None G2 S2 1B.2 SB_SBBG; USFS_S Altered flood/tidal/hydrologic regime, Biocides, Dam/Inundation, Development, Erosion/runoff, Foot traffic/trampling, Grazing, Logging, Other, Recreational use (non-ORV), Road/trail construction/maint. Lower montane coniferous forest, Meadows and seeps, Riparian forest Mesic 780 2200 2560 7220 Yes 1974-01-01
No Photo Available
Delphinium purpusii rose-flowered larkspur Ranunculaceae perennial herb (Mar)Apr-May None None G3 S3 1B.3 BLM_S; USFS_S Development, Foot traffic/trampling, Grazing, Non-native plant impacts, Other, Over-collecting/poaching, Recreational use (non-ORV), Road/trail construction/maint., Vandalism/dumping/litter Chaparral, Cismontane woodland, Pinyon and juniper woodland Carbonate (often), Rocky 300 1340 985 4395 Yes 1980-01-01
No Photo Available
Delphinium recurvatum recurved larkspur Ranunculaceae perennial herb Mar-Jun None None G2? S2? 1B.2 BLM_S; SB_SBBG Agriculture, Dam/Inundation, Development, Erosion/runoff, Foot traffic/trampling, Grazing, Landfill, Mining, Non-native plant impacts, ORV activity, Other, Road/trail construction/maint., Vandalism/dumping/litter Chenopod scrub, Cismontane woodland, Valley and foothill grassland Alkaline 3 790 10 2590 Yes 1988-01-01
No Photo Available
Campanula scabrella rough harebell Campanulaceae perennial rhizomatous herb Aug-Sep None None G4 S4 4.3 SB_CalBG/RSABG Alpine boulder and rock field (serpentinite, volcanic) 2285 2800 7495 9185 1974-01-01 Photo of Campanula scabrella
©2008 Robert E. Preston, Ph.D.
Astragalus rattanii var. rattanii Rattan's milk-vetch Fabaceae perennial herb Apr-Jul None None G4T4 S4 4.3 Chaparral, Cismontane woodland, Lower montane coniferous forest Gravelly, Streambanks 30 825 100 2705 Yes 1988-01-01
No Photo Available
Astragalus ravenii Raven's milk-vetch Fabaceae perennial herb Jul-Sep None None G2 S2 1B.3 USFS_S Foot traffic/trampling, Road/trail construction/maint. Alpine boulder and rock field, Upper montane coniferous forest Gravelly 3355 3460 11010 11350 Yes 1974-01-01
No Photo Available
Ceanothus confusus Rincon Ridge ceanothus Rhamnaceae perennial evergreen shrub Feb-Jun None None G1 S1 1B.1 BLM_S; SB_SBBG Agriculture, Development, Grazing, Logging, ORV activity, Other, Recreational use (non-ORV), Road/trail construction/maint., Wood cutting or brush clearing Chaparral, Cismontane woodland, Closed-cone coniferous forest Serpentine (sometimes), Volcanic (sometimes) 75 1065 245 3495 Yes 1980-01-01 Photo of Ceanothus confusus
© 2012 Jake Ruygt
Chlorogalum grandiflorum Red Hills soaproot Agavaceae perennial bulbiferous herb (Apr)May-Jun None None G3 S3 1B.2 BLM_S; SB_SBBG Biocides, Development, Disking, Erosion/runoff, Foot traffic/trampling, Grazing, 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 Chaparral, Cismontane woodland, Lower montane coniferous forest Gabbroic, Serpentine 245 1690 805 5545 Yes 1974-01-01
No Photo Available
Chorizanthe robusta var. robusta robust spineflower Polygonaceae annual herb Apr-Sep FE None G2T1 S1 1B.1 Development, Logging, Non-native plant impacts, ORV activity, Other, Recreational use (non-ORV), Road/trail construction/maint., Wood cutting or brush clearing Chaparral (maritime), Cismontane woodland (openings), Coastal dunes, Coastal scrub Gravelly (sometimes), Sandy (sometimes) 3 300 10 985 Yes 1980-01-01
No Photo Available
Johnstonella costata ribbed cryptantha Boraginaceae annual herb Feb-May None None G4G5 S4 4.3 SB_CalBG/RSABG Desert dunes, Mojavean desert scrub, Sonoran desert scrub Sandy -60 500 -195 1640 1974-01-01
No Photo Available
Cryptantha rattanii Rattan's cryptantha Boraginaceae annual herb Apr-Jul None None G4 S4 4.3 Cismontane woodland, Riparian woodland, Valley and foothill grassland 245 915 805 3000 Yes 1974-01-01
No Photo Available
Erigeron robustior robust daisy Asteraceae perennial herb Jun-Jul None None G3 S3 4.3 Lower montane coniferous forest, Meadows and seeps Serpentine (sometimes) 200 610 655 2000 Yes 1988-01-01
No Photo Available
Monardella saxicola rock monardella Lamiaceae perennial rhizomatous herb Jun-Sep None None G3 S3 4.2 USFS_S Chaparral, Closed-cone coniferous forest, Lower montane coniferous forest Rocky, Serpentine (usually) 500 1800 1640 5905 Yes 1974-01-01 Photo of Monardella saxicola
© 2004 Naomi Fraga
Eriogonum contiguum Reveal's buckwheat Polygonaceae annual herb (Feb)Mar-May(Jun) None None G3 S2 2B.3 BLM_S; SB_CalBG/RSABG Channelization, Erosion/runoff, Foot traffic/trampling, Grazing, Non-native plant impacts, ORV activity, Road/trail construction/maint. Mojavean desert scrub (sandy) 30 1320 100 4330 1974-01-01
No Photo Available
Eriogonum grande var. rubescens red-flowered buckwheat Polygonaceae perennial herb Apr-Oct None None G4T3 S3 1B.2 Erosion/runoff Chaparral, Coastal bluff scrub, Coastal scrub 10 245 35 805 Yes 1980-01-01
No Photo Available
Eriogonum hoffmannii var. robustius robust Hoffmann's buckwheat Polygonaceae annual herb Aug-Nov None None G3T3 S3 1B.3 BLM_S; SB_CalBG/RSABG Mojavean desert scrub (sandy) 150 1680 490 5510 Yes 1974-01-01
No Photo Available
Fritillaria roderickii Roderick's fritillary Liliaceae perennial bulbiferous herb Mar-May None CE G1Q S1 1B.1 SB_CalBG/RSABG Development, Erosion/runoff, Foot traffic/trampling, Grazing, Non-native plant impacts, Road/trail construction/maint., Wood cutting or brush clearing Coastal bluff scrub, Coastal prairie, Valley and foothill grassland 15 400 50 1310 Yes 1974-01-01
No Photo Available
Aliciella ripleyi Ripley's aliciella Polemoniaceae perennial herb May-Jul None None G3 S2 2B.3 Grazing, Mining, Non-native plant impacts, Road/trail construction/maint. Mojavean desert scrub (carbonate) 305 1950 1000 6400 1974-01-01 Photo of Aliciella ripleyi
© 2020 Joey Malone
Xanthisma junceum rush-like bristleweed Asteraceae perennial herb Jan-Oct None None G5 S4 4.3 SB_CRES Chaparral, Coastal scrub 240 1000 785 3280 1974-01-01
No Photo Available
Deinandra arida Red Rock tarplant Asteraceae annual herb Apr-Nov None CR G1 S1 1B.2 SB_CalBG/RSABG Mining, Non-native plant impacts, ORV activity, Recreational use (non-ORV), Road/trail construction/maint. Mojavean desert scrub (clay, volcanic tuff) 300 950 985 3115 Yes 1974-01-01 Photo of Deinandra arida
© 2012 Neal Kramer
Horkelia truncata Ramona horkelia Rosaceae perennial herb May-Jun None None G3 S3 1B.3 BLM_S; SB_CalBG/RSABG; SB_CRES; SB_UCBG; USFS_S Foot traffic/trampling, Improper burning regime, Military operations, Mining, Recreational use (non-ORV), Road/trail construction/maint. Chaparral, Cismontane woodland Clay, Gabbroic 400 1300 1310 4265 1974-01-01 Photo of Horkelia truncata
© 2008 Andrew Borcher
Juncus leiospermus var. leiospermus Red Bluff dwarf rush Juncaceae annual herb Mar-Jun None None G2T2 S2 1B.1 BLM_S; USFS_S Agriculture, Altered flood/tidal/hydrologic regime, Dam/Inundation, Development, Foot traffic/trampling, Grazing, Logging, Mining, ORV activity, Other, Road/trail construction/maint., Vandalism/dumping/litter Chaparral, Cismontane woodland, Meadows and seeps, Valley and foothill grassland, Vernal pools Vernally Mesic 35 1250 115 4100 Yes 1974-01-01 Photo of Juncus leiospermus var. leiospermus
©2016 Dylan Neubauer
Juncus regelii Regel's rush Juncaceae perennial rhizomatous herb Aug None None G4 S1 2B.3 Meadows and seeps, Upper montane coniferous forest Mesic 760 1900 2495 6235 1974-01-01 Photo of Juncus regelii
© 2018 Susan McDougall
Layia discoidea rayless layia Asteraceae annual herb May None None G2 S2 1B.1 BLM_S; SB_CalBG/RSABG ORV activity, Recreational use (non-ORV) Chaparral, Cismontane woodland, Lower montane coniferous forest Alluvial Terraces, Serpentine, Talus 795 1585 2610 5200 Yes 1974-01-01 Photo of Layia discoidea
© 2010 Aaron Schusteff
Lilium rubescens redwood lily Liliaceae perennial bulbiferous herb (Mar)Apr-Aug(Sep) None None G3 S3 4.2 SB_CalBG/RSABG; SB_USDA Broadleafed upland forest, Chaparral, Lower montane coniferous forest, North Coast coniferous forest, Upper montane coniferous forest Roadsides (sometimes), Serpentine (sometimes) 30 1910 100 6265 Yes 1974-01-01 Photo of Lilium rubescens
Gerald and Buff Corsi © 2022 California Academy of Sciences
Leptosiphon rattanii Rattan's leptosiphon Polemoniaceae annual herb May-Jul None None G4 S4 4.3 Cismontane woodland, Lower montane coniferous forest Gravelly (sometimes), Rocky (sometimes) 1700 2000 5580 6560 Yes 1974-01-01 Photo of Leptosiphon rattanii
© Bob Patterson and CNPS
Acmispon rubriflorus red-flowered bird's-foot trefoil Fabaceae annual herb Apr-Jun None None G2 S2 1B.1 Development, Grazing, ORV activity, Other Cismontane woodland, Valley and foothill grassland 200 425 655 1395 Yes 1974-01-01 Photo of Acmispon rubriflorus
© 2011 Dean Wm. Taylor, Ph.D.
Lycopodium clavatum running-pine Lycopodiaceae perennial rhizomatous herb Jun-Aug(Sep) None None G5 S3 4.1 Altered flood/tidal/hydrologic regime, Biocides, Development, Foot traffic/trampling, Logging, Non-native plant impacts, ORV activity, Other, Road/trail construction/maint. Lower montane coniferous forest (mesic), Marshes and swamps, North Coast coniferous forest (mesic) Edges (often), Openings, Roadsides 45 1225 150 4020 1974-01-01 Photo of Lycopodium clavatum
© 2021 Scot Loring
Holmgrenanthe petrophila rock lady Plantaginaceae perennial herb Apr-Jun None CR G1 S1 1B.2 SB_CalBG/RSABG Foot traffic/trampling, Road/trail construction/maint. Mojavean desert scrub (carbonate, rocky) 515 1675 1690 5495 Yes 1974-01-01
No Photo Available
Silene greenei ssp. angustifolia Red Mountain catchfly Caryophyllaceae perennial herb May-Jun None CE G5T1 S1 1B.2 BLM_S Erosion/runoff, Logging, Mining, Other, Road/trail construction/maint., Vandalism/dumping/litter Chaparral, Lower montane coniferous forest Rocky, Serpentine (usually) 425 2085 1395 6840 Yes 1980-01-01 Photo of Silene greenei ssp. angustifolia
© 2015 Cherilyn Burton
Monardella robisonii Robison's monardella Lamiaceae perennial rhizomatous herb (Feb)Apr-Sep(Oct) None None G3 S3 1B.3 BLM_S; SB_CalBG/RSABG Development, Foot traffic/trampling, Non-native plant impacts, ORV activity, Recreational use (non-ORV), Road/trail construction/maint. Pinyon and juniper woodland 610 1500 2000 4920 Yes 1974-01-01
No Photo Available
Aphyllon validum ssp. validum Rock Creek broomrape Orobanchaceae perennial herb (parasitic) May-Sep None None G4T2 S2 1B.2 SB_CalBG/RSABG; USFS_S Erosion/runoff, Foot traffic/trampling, Non-native plant impacts, Recreational use (non-ORV), Road/trail construction/maint. Chaparral, Pinyon and juniper woodland Granitic 1030 2000 3380 6560 Yes 1974-01-01
No Photo Available
Lathyrus rigidus rigid pea Fabaceae perennial herb Apr-Jul None None G5 S1 2B.2 Grazing, Other Great Basin scrub, Pinyon and juniper woodland Disturbed areas (often) 800 1750 2625 5740 2001-01-01 Photo of Lathyrus rigidus
© 2008 Christopher L. Christie
Leptosiphon rosaceus rose leptosiphon Polemoniaceae annual herb Apr-Jul None None G1 S1 1B.1 SB_CalBG/RSABG Erosion/runoff, Foot traffic/trampling, Grazing, Non-native plant impacts, Road/trail construction/maint. Coastal bluff scrub 0 100 0 330 Yes 2001-01-01 Photo of Leptosiphon rosaceus
© 2013 Aaron Schusteff
Lepidium virginicum var. robinsonii Robinson's pepper-grass Brassicaceae annual herb Jan-Jul None None G5T3 S3 4.3 Development, Foot traffic/trampling, Grazing, Non-native plant impacts, Road/trail construction/maint., Wood cutting or brush clearing Chaparral, Coastal scrub 1 885 5 2905 1994-01-01 Photo of Lepidium virginicum var. robinsonii
© 2015 Keir Morse
Thermopsis robusta robust false lupine Fabaceae perennial rhizomatous herb May-Jul None None G2 S2 1B.2 SB_UCSC; USFS_S Biocides, Grazing, Improper burning regime, Insufficient population/stand size, Logging, Mining, Non-native plant impacts, ORV activity, Other, Road/trail construction/maint., Wood cutting or brush clearing Broadleafed upland forest, North Coast coniferous forest 150 1500 490 4920 Yes 1994-01-01 Photo of Thermopsis robusta
©2018 Hayley Ross
Rhynchospora globularis round-headed beaked-rush Cyperaceae perennial rhizomatous herb Jul-Aug None None G5 S1 2B.1 Marshes and swamps (freshwater) 45 60 150 195 1974-01-01
No Photo Available
Sanicula saxatilis rock sanicle Apiaceae perennial herb Apr-May None CR G2 S2 1B.2 SB_CalBG/RSABG Development, Foot traffic/trampling, Non-native plant impacts, Recreational use (non-ORV), Road/trail construction/maint. Broadleafed upland forest, Chaparral, Valley and foothill grassland Rocky, Scree, Talus 620 1175 2035 3855 Yes 1974-01-01 Photo of Sanicula saxatilis
© 1998 John Game
Sedum eastwoodiae Red Mountain stonecrop Crassulaceae perennial herb May-Jul None None G2 S2 1B.2 BLM_S Erosion/runoff, Logging Lower montane coniferous forest (serpentinite) 600 1200 1970 3935 Yes 1980-01-01
No Photo Available
Sphaeralcea rusbyi var. eremicola Rusby's desert-mallow Malvaceae perennial herb Mar-Jun None None G4T2 S2 1B.2 BLM_S; SB_CalBG/RSABG; SB_USDA Development, Foot traffic/trampling, Grazing, Mining, Non-native animal impacts, Non-native plant impacts, ORV activity, Other, Road/trail construction/maint. Joshua tree "woodland", Mojavean desert scrub 975 1645 3200 5395 Yes 1974-01-01
No Photo Available
Verbena californica Red Hills vervain Verbenaceae perennial herb May-Sep FT CT G2 S2 1B.1 SB_CalBG/RSABG; SB_UCBG Altered flood/tidal/hydrologic regime, Development, Feral pigs, Foot traffic/trampling, Grazing, Improper burning regime, Mining, Non-native plant impacts, ORV activity, Other, Recreational use (non-ORV), Vandalism/dumping/litter Cismontane woodland, Valley and foothill grassland Mesic, Seeps (usually), Serpentine (usually) 260 400 855 1310 Yes 1984-01-01
No Photo Available
Abronia maritima red sand-verbena Nyctaginaceae perennial herb Feb-Nov None None G4 S3? 4.2 SB_CalBG/RSABG Coastal dunes 0 100 0 330 1994-01-01 Photo of Abronia maritima
©2003 Christopher L. Christie
Clarkia concinna ssp. raichei Raiche's red ribbons Onagraceae annual herb Apr-May None None G5?T1 S1 1B.1 SB_CalBG/RSABG; SB_UCBG Grazing, Road/trail construction/maint. Coastal bluff scrub 0 100 0 330 Yes 1994-01-01 Photo of Clarkia concinna ssp. raichei
© 2015 Aaron Schusteff
Collinsia corymbosa round-headed collinsia Plantaginaceae annual herb Apr-Jun None None G1 S1 1B.2 SB_CalBG/RSABG Development, Foot traffic/trampling, Non-native plant impacts, ORV activity Coastal dunes 0 20 0 65 Yes 1994-01-01 Photo of Collinsia corymbosa
©2007 Steve Matson
Eschscholzia minutiflora ssp. twisselmannii Red Rock poppy Papaveraceae annual herb Mar-May None None G5T2 S2 1B.2 BLM_S; SB_CalBG/RSABG; SB_USDA Erosion/runoff, Foot traffic/trampling, Grazing, Mining, Non-native plant impacts, ORV activity, Other, Recreational use (non-ORV), Road/trail construction/maint., Vandalism/dumping/litter Mojavean desert scrub (volcanic tuff) 680 1230 2230 4035 Yes 1994-01-01
No Photo Available
Jamesia americana var. rosea rosy-petalled cliffbush Hydrangeaceae perennial deciduous shrub May-Sep None None G5T4 S4 4.3 SB_CalBG/RSABG Alpine boulder and rock field, Great Basin scrub, Pinyon and juniper woodland, Subalpine coniferous forest Carbonate (sometimes), Granitic (sometimes), Rocky 1980 3700 6495 12140 1994-01-01 Photo of Jamesia americana var. rosea
© 2005 Steve Matson
Potamogeton robbinsii Robbins' pondweed Potamogetonaceae perennial rhizomatous herb (aquatic) Jul-Aug None None G5 S3 2B.3 IUCN_LC Altered flood/tidal/hydrologic regime, Erosion/runoff, Non-native plant impacts, Other, Recreational use (non-ORV) Marshes and swamps (lakes, deep water) 1530 3300 5020 10825 1994-01-01 Photo of Potamogeton robbinsii
©2014 Dana York
Selaginella scopulorum Rocky Mountain spike-moss Selaginellaceae perennial rhizomatous herb Jul-Aug None None G5T5? S2S3 2B.3 Subalpine coniferous forest, Upper montane coniferous forest Granitic, Metamorphic, Rocky, Volcanic 1430 2285 4690 7495 2001-01-01 Photo of Selaginella scopulorum
©2014 Dana York
Senecio clevelandii var. heterophyllus Red Hills ragwort Asteraceae perennial herb May-Jul None None G4?T2Q S2 1B.2 BLM_S; SB_SBBG Altered flood/tidal/hydrologic regime, Development, Foot traffic/trampling, Grazing, Improper burning regime, ORV activity, Other, Recreational use (non-ORV) Cismontane woodland (seeps, serpentinite) 260 385 855 1265 Yes 1994-01-01
No Photo Available
Arctostaphylos rainbowensis Rainbow manzanita Ericaceae perennial evergreen shrub Dec-Mar None None G2 S2 1B.1 BLM_S; SB_CRES; USFS_S Agriculture, Development, Improper burning regime, Military operations, Mining, Non-native plant impacts, ORV activity, Other, Recreational use (non-ORV), Road/trail construction/maint. Chaparral 205 670 675 2200 Yes 1994-01-01
No Photo Available
Arenaria lanuginosa var. saxosa rock sandwort Caryophyllaceae perennial herb Jul-Aug None None G5T5 S2 2B.3 SB_CalBG/RSABG; USFS_S Foot traffic/trampling, Over-collecting/poaching, Recreational use (non-ORV) Subalpine coniferous forest, Upper montane coniferous forest Mesic, Sandy 1455 2600 4775 8530 2001-01-01
No Photo Available
Botrypus virginianus rattlesnake fern Ophioglossaceae perennial herb Jun-Sep None None G5 S2 2B.2 Altered flood/tidal/hydrologic regime, Foot traffic/trampling, Grazing, Insufficient population/stand size, Logging, Other, Road/trail construction/maint. Bogs and fens, Lower montane coniferous forest (mesic), Meadows and seeps, Riparian forest Streambanks 715 1355 2345 4445 2001-01-01 Photo of Botrypus virginianus
©2003 Martin J. Lenz
Euphorbia revoluta revolute spurge Euphorbiaceae annual herb Aug-Sep None None G5 S4 4.3 SB_CalBG/RSABG Mojavean desert scrub (rocky) 1095 3100 3595 10170 2001-01-01
No Photo Available
Mirabilis coccinea red four o'clock Nyctaginaceae perennial herb May-Jul None None G4G5 S2 2B.3 SB_CalBG/RSABG Development, Grazing, Mining, Non-native animal impacts, Non-native plant impacts, ORV activity, Vandalism/dumping/litter Pinyon and juniper woodland 1070 1800 3510 5905 2001-01-01
No Photo Available
Oxytropis oreophila var. oreophila rock-loving oxytrope Fabaceae perennial herb Jun-Sep None None G5T4T5 S2 2B.3 SB_CalBG/RSABG; USFS_S Foot traffic/trampling, Recreational use (non-ORV) Alpine boulder and rock field, Subalpine coniferous forest Gravelly (sometimes), Rocky (sometimes) 3400 3800 11155 12470 2001-01-01
No Photo Available
Penstemon bicolor ssp. roseus rosy two-toned beardtongue Plantaginaceae perennial herb May None None G3T3Q S1 1B.1 BLM_S; SB_CalBG/RSABG Development, Grazing, Mining, Non-native animal impacts, ORV activity Joshua tree "woodland", Mojavean desert scrub Disturbed areas (sometimes), Gravelly (sometimes), Rocky (sometimes) 700 1500 2295 4920 2001-01-01 Photo of Penstemon bicolor ssp. roseus
James M. Andre 2010
Petradoria pumila ssp. pumila rock goldenrod Asteraceae perennial herb Jul-Oct None None G5T4 S4? 4.3 SB_CalBG/RSABG Pinyon and juniper woodland (carbonate, rocky) 1070 3400 3510 11155 2001-01-01
No Photo Available
Packera indecora rayless mountain ragwort Asteraceae perennial herb Jul-Aug None None G5 S2? 2B.2 SB_UCSC Meadows and seeps (mesic) 1450 2000 4755 6560 2001-01-01 Photo of Packera indecora
© 2013 Kirsten Bovee
Boechera pendulina rabbit-ear rockcress Brassicaceae perennial herb Apr-Jun None None G5? S2 2B.1 Foot traffic/trampling Great Basin scrub, Pinyon and juniper woodland Carbonate (sometimes), Gravelly (sometimes), Rocky (sometimes) 3050 3200 10005 10500 2004-01-01
No Photo Available
Lepechinia rossii Ross' pitcher sage Lamiaceae perennial shrub May-Sep None None G1 S1 1B.2 SB_CalBG/RSABG; USFS_S Mining, ORV activity, Other Chaparral 305 790 1000 2590 Yes 2006-10-26
No Photo Available
Menodora scabra var. scabra rough menodora Oleaceae perennial herb May-Jun None None G5T4T5 S3 2B.3 SB_CalBG/RSABG Development, Grazing, Mining, Non-native plant impacts, ORV activity Joshua tree "woodland", Mojavean desert scrub, Pinyon and juniper woodland 1200 1800 3935 5905 2006-12-05
No Photo Available
Greeneocharis circumscissa var. rosulata rosette cushion cryptantha Boraginaceae annual herb Jul-Aug None None G5T2 S2 1B.2 USFS_S Foot traffic/trampling, Grazing Alpine boulder and rock field, Subalpine coniferous forest Granitic, Gravelly 2950 3660 9680 12010 Yes 2008-11-20
No Photo Available
Nemacladus secundiflorus var. robbinsii Robbins' nemacladus Campanulaceae annual herb Apr-Jun None None G3T2 S2 1B.2 USFS_S Mining, Road/trail construction/maint. Chaparral, Valley and foothill grassland Openings 350 1700 1150 5580 Yes 2010-06-25
No Photo Available
Thysanocarpus rigidus rigid fringepod Brassicaceae annual herb Feb-May None None G2 S2 1B.2 SB_CalBG/RSABG; USFS_S Development, Recreational use (non-ORV), Vandalism/dumping/litter Pinyon and juniper woodland Dry, Rocky, Slopes 600 2200 1970 7220 2011-03-17
No Photo Available
Boechera rollei Rolle's rockcress Brassicaceae perennial herb Aug None None G1 S1 1B.1 SB_CalBG/RSABG Upper montane coniferous forest Rocky, Slopes 1600 1800 5250 5905 2011-06-01 Photo of Boechera rollei
©2012 Dana York
Sidalcea celata Redding checkerbloom Malvaceae perennial herb Apr-Aug None None G2G3 S2S3 3 Cismontane woodland Serpentine (sometimes) 135 1525 445 5005 Yes 2012-07-11 Photo of Sidalcea celata
©2014 Lawrence Janeway
Erythranthe rhodopetra Red Rock Canyon monkeyflower Phrymaceae annual herb Mar-Apr None None G1 S1 1B.1 BLM_S; SB_CalBG/RSABG Foot traffic/trampling, ORV activity, Recreational use (non-ORV), Road/trail construction/maint. Mojavean desert scrub Sandy, Washes 610 915 2000 3000 Yes 2013-07-08 Photo of Erythranthe rhodopetra
© 2015 Cindy Hopkins
Panicum hirticaule ssp. hirticaule roughstalk witch grass Poaceae annual herb Aug-Dec None None G5T5 S2 2B.1 SB_CalBG/RSABG Development, Foot traffic/trampling, Mining, ORV activity Desert dunes, Joshua tree "woodland", Mojavean desert scrub, Sonoran desert scrub Sandy 45 1315 150 4315 2013-08-28
No Photo Available
Eriastrum rosamondense Rosamond eriastrum Polemoniaceae annual herb Apr-May(Jun-Jul) None None G1? S1? 1B.1 SB_CalBG/RSABG Chenopod scrub (openings), Vernal pools (edges) Alkaline, Sandy (often) 700 1175 2295 3855 Yes 2013-12-04
No Photo Available
Jaffueliobryum raui Rau's jaffueliobryum moss Grimmiaceae moss None None G4 S2 2B.3 ORV activity, Road/trail construction/maint. Alpine dwarf scrub, Chaparral, Mojavean desert scrub, Sonoran desert scrub Carbonate, Dry, Openings, Rock crevices 490 2100 1610 6890 2014-05-15 Photo of Jaffueliobryum raui
© 2021 Scot Loring
Solidago lepida var. salebrosa Rocky Mountains Canada goldenrod Asteraceae perennial rhizomatous herb Jul-Sep None None G5T5 S1 3.2 Marshes and swamps (lake margins, streambanks), Meadows and seeps (mesic) 1080 1390 3545 4560 2014-09-29
No Photo Available
Cryptantha spithamaea Red Hills cryptantha Boraginaceae annual herb Apr-May None None G2 S2 1B.3 BLM_S; SB_UCSC Chaparral, Cismontane woodland Openings (sometimes), Serpentine, Streambanks (sometimes) 275 460 900 1510 2014-12-18
No Photo Available
Cryptantha rostellata red-stemmed cryptantha Boraginaceae annual herb Apr-Jun None None G4 S3 4.2 Cismontane woodland, Valley and foothill grassland Gravelly (often), Openings, Roadsides (often), Volcanic 40 800 130 2625 2018-06-26
No Photo Available
Lomatium ravenii var. ravenii Raven's lomatium Apiaceae perennial herb Apr-Jun None None G4T2 S2 1B.3 BLM_S; SB_UCSC Other Great Basin scrub Adobe, Alkaline, Clay, Loam 1615 1775 5300 5825 Yes 2018-02-07
No Photo Available
Claytonia obovata Rydberg's spring beauty Montiaceae perennial herb (Mar-Apr)May-Jun(Jul) None None G4 S3 4.3 Subalpine coniferous forest Openings (usually), Rocky, Talus 1385 2835 4545 9300 2020-03-03 Photo of Claytonia obovata
©2015 John Doyen
Orthocarpus bracteosus rosy orthocarpus Orobanchaceae annual herb Jun-Sep None None G3 S1 2B.2 Altered flood/tidal/hydrologic regime, Grazing, Other Meadows and seeps 1030 1850 3380 6070 2020-09-28 Photo of Orthocarpus bracteosus
©2016 Keir Morse
Aphyllon robbinsii Robbins' broomrape Orobanchaceae annual herb (achlorophyllous) Apr-Jul None None G1 S1 1B.1 Development, Foot traffic/trampling, Non-native plant impacts, Other Coastal bluff scrub Rocky, Sandy 0 100 0 330 2023-03-28 Photo of Aphyllon robbinsii
© 2017 Dylan Neubauer
Schoenoplectiella saximontana Rocky Mountain bulrush Cyperaceae annual rhizomatous herb (Mar-May)Jun-Sep(Oct) None None 2B.1 Marshes and swamps (margins), Vernal pools Sandy (often) 45 720 150 2360 2024-04-11
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 20 April 2024].