CNPS

CNPS Rare Plant Inventory


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91 matches found. Click on scientific name for details

Search Criteria: Common Name starts with A

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 cruzensis Arroyo de la Cruz manzanita Ericaceae perennial evergreen shrub Dec-Mar None None G1G2 S1S2 1B.2 BLM_S; SB_SBBG; USFS_S Foot traffic/trampling, Grazing, Other, Wood cutting or brush clearing Broadleafed upland forest, Chaparral, Closed-cone coniferous forest, Coastal bluff scrub, Coastal scrub, Valley and foothill grassland Sandy 60 310 195 1015 Yes 1974-01-01 Photo of Arctostaphylos cruzensis
© 2006 Steve Matson
Calochortus striatus alkali mariposa-lily Liliaceae perennial bulbiferous herb Apr-Jun None None G3 S2S3 1B.2 BLM_S; SB_CalBG/RSABG; USFS_S Agriculture, Dam/Inundation, Development, Foot traffic/trampling, Grazing, Groundwater pumping, Military operations, Mining, Non-native plant impacts, ORV activity, Other, Road/trail construction/maint., Surface water diversion, Vandalism/dumping/litter Chaparral, Chenopod scrub, Meadows and seeps, Mojavean desert scrub Alkaline, Mesic 70 1595 230 5235 1974-01-01
No Photo Available
Aphanisma blitoides aphanisma Chenopodiaceae annual herb Feb-Jun None None G3G4 S2 1B.2 SB_CRES; SB_SBBG Development, Erosion/runoff, Foot traffic/trampling, Non-native plant impacts, Other, Recreational use (non-ORV), Road/trail construction/maint., Wood cutting or brush clearing Coastal bluff scrub, Coastal dunes, Coastal scrub Gravelly (sometimes), Sandy (sometimes) 1 305 5 1000 1980-01-01 Photo of Aphanisma blitoides
© 2010 Larry Sward
Astragalus anxius Ash Valley milk-vetch Fabaceae perennial herb May-Jul None None G1 S1 1B.3 BLM_S; SB_UCSC; USFS_S Foot traffic/trampling, Grazing, Logging, ORV activity, Other, Road/trail construction/maint. Great Basin scrub, Pinyon and juniper woodland, Upper montane coniferous forest Volcanic 1550 1645 5085 5395 Yes 1984-01-01
No Photo Available
Calochortus clavatus var. recurvifolius Arroyo de la Cruz mariposa-lily Liliaceae perennial bulbiferous herb Jun-Jul None None G4T1 S1 1B.2 Erosion/runoff, Grazing Chaparral (maritime), Coastal bluff scrub, Coastal prairie, Lower montane coniferous forest 10 120 35 395 Yes 1974-01-01
No Photo Available
Heuchera abramsii Abrams' alumroot Saxifragaceae perennial rhizomatous herb Jul-Aug None None G3 S3 4.3 SB_CalBG/RSABG; USFS_S Upper montane coniferous forest (rocky) 2800 3500 9185 11485 Yes 1974-01-01 Photo of Heuchera abramsii
© 2005 Charles E. Jones
Castilleja cinerea ash-gray paintbrush Orobanchaceae perennial herb (hemiparasitic) Jun-Aug FT None G1G2 S1S2 1B.2 SB_CalBG/RSABG Development, Erosion/runoff, Foot traffic/trampling, Grazing, Mining, Non-native animal impacts, Non-native plant impacts, ORV activity, Other, Recreational use (non-ORV), Road/trail construction/maint., Vandalism/dumping/litter, Wood cutting or brush clearing Meadows and seeps, Mojavean desert scrub, Pebble (Pavement) plain, Pinyon and juniper woodland, Upper montane coniferous forest (clay, openings) 1800 2960 5905 9710 Yes 1974-01-01
No Photo Available
Callitropsis nootkatensis Alaska cedar Cupressaceae perennial evergreen tree None None G4G5 S3 4.3 SB_UCSC Upper montane coniferous forest 650 2500 2135 8205 1980-01-01 Photo of Callitropsis nootkatensis
© 2021 Scot Loring
Euphorbia arizonica Arizona spurge Euphorbiaceae perennial herb Mar-Apr None None G5 S3 2B.3 Foot traffic/trampling Sonoran desert scrub (sandy) 50 300 165 985 1980-01-01
No Photo Available
Cirsium ciliolatum Ashland thistle Asteraceae perennial herb Jun-Aug None CE G3 S1 2B.1 Biocides, Grazing, Non-native plant impacts, Other, Road/trail construction/maint. Cismontane woodland, Valley and foothill grassland 800 1400 2625 4595 1980-01-01 Photo of Cirsium ciliolatum
© 2021 Scot Loring
Escobaria alversonii Alverson's foxtail cactus Cactaceae perennial stem Apr-Jun(Sep-Oct) None None G3 S3 4.3 Development, Landfill, Military operations, Mining, Other, Road/trail construction/maint. Mojavean desert scrub, Sonoran desert scrub Granitic (usually), Rocky (sometimes), Sandy (sometimes) 75 1525 245 5005 Yes 1974-01-01
No Photo Available
Thalictrum alpinum arctic meadow-rue Ranunculaceae perennial stoloniferous herb Jul-Aug None None G5 S3 4.3 Alpine boulder and rock field, Marshes and swamps (edges), Meadows and seeps Mesic 2805 3700 9205 12140 2001-01-01
No Photo Available
Phacelia anelsonii Aven Nelson's phacelia Hydrophyllaceae annual herb Apr-May None None G3 S2 2B.3 SB_CalBG/RSABG Joshua tree "woodland", Pinyon and juniper woodland Carbonate, Gravelly (sometimes), Sandy (sometimes) 1200 1980 3935 6495 1980-01-01
No Photo Available
Sanicula maritima adobe sanicle Apiaceae perennial herb Feb-May None CR G2 S2 1B.1 SB_SBBG; USFS_S Development, Erosion/runoff, Feral pigs, Foot traffic/trampling, Grazing, Improper burning regime, Military operations, Non-native plant impacts, Recreational use (non-ORV), Road/trail construction/maint., Vandalism/dumping/litter Chaparral, Coastal prairie, Meadows and seeps, Valley and foothill grassland Clay, Serpentine 30 240 100 785 Yes 1974-01-01
No Photo Available
Eriogonum umbellatum var. minus alpine sulfur-flowered buckwheat Polygonaceae perennial herb Jun-Sep None None G5T4 S4 4.3 SB_CalBG/RSABG Subalpine coniferous forest, Upper montane coniferous forest Gravelly 1800 3068 5905 10065 Yes 1974-01-01
No Photo Available
Eucnide rupestris annual rock-nettle Loasaceae annual herb Dec-Apr None None G3 S1 2B.2 ORV activity, Recreational use (non-ORV), Vandalism/dumping/litter Sonoran desert scrub 500 600 1640 1970 1974-01-01
No Photo Available
Fritillaria pluriflora adobe-lily Liliaceae perennial bulbiferous herb Feb-Apr None None G2G3 S2S3 1B.2 BLM_S; SB_CalBG/RSABG; SB_UCBG Biocides, Dam/Inundation, Development, Foot traffic/trampling, Grazing, Non-native plant impacts, ORV activity, Other, Over-collecting/poaching, Recreational use (non-ORV), Road/trail construction/maint. Chaparral, Cismontane woodland, Valley and foothill grassland Adobe (often) 60 705 195 2315 Yes 1974-01-01 Photo of Fritillaria pluriflora
© 2015 Steve Matson
Galium californicum ssp. primum Alvin Meadow bedstraw Rubiaceae perennial herb May-Jul None None G5T2 S2 1B.2 SB_CalBG/RSABG; USFS_S Hybridization, Logging, Recreational use (non-ORV), Road/trail construction/maint., Vandalism/dumping/litter Chaparral, Lower montane coniferous forest Granitic, Sandy 1350 1700 4430 5580 Yes 1974-01-01 Photo of Galium californicum ssp. primum
© 2013 Keir Morse
Glyceria grandis American manna grass Poaceae perennial rhizomatous herb Jun-Aug None None G5 S3 2B.3 Grazing Bogs and fens, Marshes and swamps (lake margins, streambanks), Meadows and seeps 15 1980 50 6495 1974-01-01 Photo of Glyceria grandis
©2004 Dean Wm. Taylor
Grindelia fraxinipratensis Ash Meadows gumplant Asteraceae perennial herb Jun-Oct FT None G2 S1 1B.2 SB_CalBG/RSABG Foot traffic/trampling, Non-native animal impacts, Surface water diversion Meadows and seeps (mesic clay) 635 700 2085 2295 1980-01-01 Photo of Grindelia fraxinipratensis
© 2010 James M. Andre
Hackelia amethystina amethyst stickseed Boraginaceae perennial herb Jun-Jul(Aug) None None G4 S4 4.3 Lower montane coniferous forest, Meadows and seeps, Upper montane coniferous forest Disturbed areas, Openings 1500 2315 4920 7595 Yes 1974-01-01 Photo of Hackelia amethystina
© 2018 John Doyen
Helianthus niveus ssp. tephrodes Algodones Dunes sunflower Asteraceae perennial herb Sep-May None CE G4T2T3 S1 1B.2 BLM_S; SB_CalBG/RSABG; SB_USDA ORV activity, Other Desert dunes 50 100 165 330 1974-01-01 Photo of Helianthus niveus ssp. tephrodes
© 2014 Keir Morse
Ivesia kingii var. kingii alkali ivesia Rosaceae perennial herb May-Aug None None G4T3Q S2 2B.2 BLM_S; SB_SBBG Development, Grazing, Groundwater pumping, Non-native plant impacts, ORV activity, Recreational use (non-ORV), Road/trail construction/maint. Great Basin scrub, Meadows and seeps, Playas Alkaline, Clay, Mesic 1200 2130 3935 6990 1988-01-01 Photo of Ivesia kingii var. kingii
© 2008 Steve Matson
Ivesia paniculata Ash Creek ivesia Rosaceae perennial herb May-Aug None None G2 S2 1B.2 BLM_S; SB_UCSC; USFS_S Foot traffic/trampling, Grazing, Logging, Mining, ORV activity, Road/trail construction/maint., Wood cutting or brush clearing Great Basin scrub, Pinyon and juniper woodland, Upper montane coniferous forest Gravelly (sometimes), Rocky (sometimes), Volcanic 1500 1950 4920 6400 Yes 1980-01-01 Photo of Ivesia paniculata
© 2007 F. Gauna
Juncus leiospermus var. ahartii Ahart's dwarf rush Juncaceae annual herb Mar-May None None G2T1 S1 1B.2 Agriculture, Development, Grazing, Mining, ORV activity, Other, Road/trail construction/maint. Valley and foothill grassland (mesic) 30 229 100 750 Yes 1984-01-01 Photo of Juncus leiospermus var. ahartii
© 2004 Carol W. Witham
Lupinus albifrons var. abramsii Abrams' lupine Fabaceae perennial herb Apr-Jun None None G5T3?Q S3? 3.2 IUCN_NT Broadleafed upland forest, Chaparral, Coastal scrub, Lower montane coniferous forest, Valley and foothill grassland Serpentine (sometimes) 125 2000 410 6560 Yes 1974-01-01
No Photo Available
Lupinus antoninus Anthony Peak lupine Fabaceae perennial herb May-Jul None None G2 S2 1B.2 USFS_S Lower montane coniferous forest, Upper montane coniferous forest Rocky 1220 2285 4005 7495 Yes 1980-01-01 Photo of Lupinus antoninus
©2018 John Doyen
Malacothamnus abbottii Abbott's bush-mallow Malvaceae perennial deciduous shrub May-Oct None None G1 S1 1B.1 SB_UCSC Agriculture, Development, Erosion/runoff, Grazing, Mining, Other, Road/trail construction/maint. Riparian scrub 135 490 445 1610 Yes 1974-01-01 Photo of Malacothamnus abbottii
© 2018 Keir Morse
Malacothamnus arcuatus var. arcuatus arcuate bush-mallow Malvaceae perennial deciduous shrub Apr-Sep None None G2Q S2 1B.2 SB_CalBG/RSABG Development, Erosion/runoff, Improper burning regime, Insufficient population/stand size, Non-native plant impacts, Other, Road/trail construction/maint., Wood cutting or brush clearing Chaparral, Cismontane woodland 15 355 50 1165 Yes 1974-01-01 Photo of Malacothamnus arcuatus var. arcuatus
© 2017 Keir Morse
Malacothamnus lucianus Arroyo Seco bush-mallow Malvaceae perennial deciduous shrub (Apr)May-Aug None None G3T1Q S1 1B.2 BLM_S; SB_CalBG/RSABG; SB_SBBG; USFS_S Altered flood/tidal/hydrologic regime, Erosion/runoff, Grazing, Non-native plant impacts, Other, Road/trail construction/maint. Chaparral, Cismontane woodland, Meadows and seeps 5 915 15 3000 Yes 1974-01-01 Photo of Malacothamnus lucianus
© 2017 Keir Morse
Astragalus tener var. tener alkali milk-vetch Fabaceae annual herb Mar-Jun None None G2T1 S1 1B.2 SB_UCSC Agriculture, Biocides, Development, Disking, Foot traffic/trampling, Grazing, Improper burning regime, Landfill, Non-native plant impacts, ORV activity, Other, Surface water diversion Playas, Valley and foothill grassland (adobe clay), Vernal pools Alkaline 1 60 5 195 Yes 1994-01-01
No Photo Available
Navarretia subuligera awl-leaved navarretia Polemoniaceae annual herb Apr-Aug None None G4 S4 4.3 Chaparral, Cismontane woodland, Lower montane coniferous forest Mesic, Rocky 150 1100 490 3610 1980-01-01 Photo of Navarretia subuligera
©2013 Jake Ruygt
Nitrophila mohavensis Amargosa nitrophila Amaranthaceae perennial herb May-Oct FE CE G1 S1 1B.1 SB_CalBG/RSABG Altered flood/tidal/hydrologic regime, Development, Foot traffic/trampling, Grazing, Groundwater pumping, Mining, ORV activity, Other, Road/trail construction/maint., Vandalism/dumping/litter Playas (mesic clay) 425 750 1395 2460 1974-01-01
No Photo Available
Oenothera deltoides ssp. howellii Antioch Dunes evening-primrose Onagraceae perennial herb Mar-Sep FE CE G5T1 S1 1B.1 SB_CalBG/RSABG; SB_UCBG Biocides, Development, Foot traffic/trampling, Mining, Non-native plant impacts, Other, Recreational use (non-ORV) Inland dunes 0 30 0 100 Yes 1974-01-01
No Photo Available
Paronychia ahartii Ahart's paronychia Caryophyllaceae annual herb Feb-Jun None None G3 S3 1B.1 BLM_S Agriculture, Development, Disking, Foot traffic/trampling, Grazing, Mining, ORV activity, Other, Road/trail construction/maint. Cismontane woodland, Valley and foothill grassland, Vernal pools 30 510 100 1675 Yes 1988-01-01 Photo of Paronychia ahartii
© 2004 Carol W. Witham
Penstemon cinereus ashy-gray beardtongue Plantaginaceae perennial herb May-Jul(Aug) None None G4Q S4 4.3 SB_CalBG/RSABG Great Basin scrub, Pinyon and juniper woodland Gravelly, Volcanic 1065 1950 3495 6400 1974-01-01 Photo of Penstemon cinereus
Dean Wm. Taylor 1990
Penstemon cinicola ash beardtongue Plantaginaceae perennial herb Jun-Aug(Sep) None None G4 S3 4.3 Lower montane coniferous forest, Meadows and seeps, Upper montane coniferous forest Rocky (sometimes), Sandy (sometimes), Volcanic 730 2685 2395 8810 1974-01-01 Photo of Penstemon cinicola
Keir Morse 2010
Penstemon fruticiformis var. amargosae Amargosa beardtongue Plantaginaceae perennial herb Apr-Jun None None G4T3 S2 1B.3 BLM_S; SB_CalBG/RSABG Grazing, Mining, Non-native animal impacts, Non-native plant impacts, ORV activity, Recreational use (non-ORV), Vandalism/dumping/litter Mojavean desert scrub 850 1400 2790 4595 1980-01-01 Photo of Penstemon fruticiformis var. amargosae
Steve Matson 2017
Trifolium andersonii ssp. andersonii Anderson's clover Fabaceae perennial herb Jun-Jul None None G5T5 S4 4.3 SB_UCSC; SB_USDA Great Basin scrub, Lower montane coniferous forest, Meadows and seeps, Pinyon and juniper woodland 900 2440 2955 8005 2001-01-01
No Photo Available
Cherleria biflora alpine sandwort Caryophyllaceae perennial herb Jul-Aug None None G5 S4 4.3 Alpine boulder and rock field, Alpine dwarf scrub, Subalpine coniferous forest Granitic, Metamorphic 3150 3700 10335 12140 1994-01-01 Photo of Cherleria biflora
© 2013 Ron Wolf
Perideridia pringlei adobe yampah Apiaceae perennial herb Apr-Jun(Jul) None None G4 S4 4.3 SB_CalBG/RSABG Chaparral, Cismontane woodland, Coastal scrub, Pinyon and juniper woodland Clay (often), Serpentine 300 1800 985 5905 Yes 1974-01-01
No Photo Available
Pholistoma auritum var. arizonicum Arizona pholistoma Hydrophyllaceae annual herb Mar None None G5T4? S3 2B.3 SB_CalBG/RSABG; SB_USDA Foot traffic/trampling, ORV activity, Other, Vandalism/dumping/litter Mojavean desert scrub 275 835 900 2740 1984-01-01
No Photo Available
Ribes menziesii var. ixoderme aromatic canyon gooseberry Grossulariaceae perennial deciduous shrub Apr None None G4T2 S2 1B.2 Road/trail construction/maint. Chaparral, Cismontane woodland 610 1160 2000 3805 Yes 1980-01-01
No Photo Available
Sanvitalia abertii Abert's sanvitalia Asteraceae annual herb Aug-Sep(Oct) None None G5 S2S3 2B.2 SB_CalBG/RSABG Development, Grazing, Logging, Mining, Non-native animal impacts, Non-native plant impacts, ORV activity, Vandalism/dumping/litter Pinyon and juniper woodland (carbonate) 1570 1800 5150 5905 1988-01-01
No Photo Available
Saussurea americana American saw-wort Asteraceae perennial herb Jul-Aug None None G5 S1 2B.2 Lower montane coniferous forest, Meadows and seeps Mesic 1735 1950 5695 6400 1974-01-01 Photo of Saussurea americana
Matt C. Berger (2019)
Scheuchzeria palustris American scheuchzeria Scheuchzeriaceae perennial rhizomatous herb (emergent) Jul-Aug None None G5 S1 2B.1 USFS_S Altered flood/tidal/hydrologic regime, Dam/Inundation, Foot traffic/trampling, Grazing, Other, Recreational use (non-ORV) Bogs and fens, Marshes and swamps (lake margins) 1370 2000 4495 6560 1974-01-01 Photo of Scheuchzeria palustris
©2021 Scot Loring
Sedum oblanceolatum Applegate stonecrop Crassulaceae perennial herb Jun-Jul None None G3 S1 1B.1 SB_BerrySB Logging, Mining, Over-collecting/poaching, Road/trail construction/maint. Upper montane coniferous forest (rocky) 400 2000 1310 6560 1988-01-01 Photo of Sedum oblanceolatum
© 2021 Scot Loring
Smelowskia ovalis alpine smelowskia Brassicaceae perennial herb Jul-Aug None None G5 S1 1B.2 Foot traffic/trampling, Road/trail construction/maint. Alpine boulder and rock field 2440 3100 8005 10170 1974-01-01 Photo of Smelowskia ovalis
© 2016 Jason Matthias Mills
Spartina gracilis alkali cord grass Poaceae perennial rhizomatous herb Jun-Aug None None G5 S3 4.2 IUCN_LC; SB_CalBG/RSABG Great Basin scrub, Marshes and swamps, Meadows and seeps Alkaline 1000 2100 3280 6890 1974-01-01
No Photo Available
Streptanthus gracilis alpine jewelflower Brassicaceae annual herb Jul-Aug None None G3 S3 1B.3 SB_CalBG/RSABG; USFS_S Foot traffic/trampling, Road/trail construction/maint. Subalpine coniferous forest, Upper montane coniferous forest Granitic, Rocky 2800 3500 9185 11485 Yes 1974-01-01
No Photo Available
Streptanthus insignis ssp. lyonii Arburua Ranch jewelflower Brassicaceae annual herb Mar-May None None G3G4T2 S2 1B.2 BLM_S Dam/Inundation, Grazing, Recreational use (non-ORV) Coastal scrub (sometimes serpentinite) 230 855 755 2805 Yes 1984-01-01
No Photo Available
Lysimachia europaea arctic starflower Myrsinaceae perennial herb Jun-Jul None None G5 S1 2B.2 Development, Foot traffic/trampling, Grazing, ORV activity, Other Bogs and fens, Meadows and seeps 0 15 0 50 1980-01-01 Photo of Lysimachia europaea
©2017 Barry Rice
Acleisanthes longiflora angel trumpets Nyctaginaceae perennial herb May None None G5 S1 2B.3 SB_CalBG/RSABG Sonoran desert scrub (carbonate) 90 95 295 310 1994-01-01 Photo of Acleisanthes longiflora
© 2013 Richard Spellenberg
Arctostaphylos andersonii Anderson's manzanita Ericaceae perennial evergreen shrub Nov-May None None G2 S2 1B.2 SB_CalBG/RSABG; SB_UCSC Biocides, Development, Erosion/runoff, Foot traffic/trampling, Improper burning regime, Logging, Non-native plant impacts, Other, Recreational use (non-ORV), Road/trail construction/maint., Wood cutting or brush clearing Broadleafed upland forest, Chaparral, North Coast coniferous forest Edges, Openings 60 760 195 2495 Yes 1974-01-01 Photo of Arctostaphylos andersonii
© 2018 Jason Matthias Mills
Carlowrightia arizonica Arizona carlowrightia Acanthaceae perennial deciduous shrub Mar-May None None G4G5 S2 2B.2 Sonoran desert scrub (granitic, alluvium, sandy) 285 430 935 1410 1994-01-01
No Photo Available
Chaenactis douglasii var. alpina alpine dusty maidens Asteraceae perennial herb Jul-Sep None None G5T5 S2 2B.3 Foot traffic/trampling, Other, Over-collecting/poaching, Recreational use (non-ORV), Vandalism/dumping/litter Alpine boulder and rock field (granitic) 2865 3400 9400 11155 1994-01-01 Photo of Chaenactis douglasii var. alpina
© 2008 Steve Matson
Eriogonum alexanderae Alexander's buckwheat Polygonaceae perennial herb May-Jul None None G3Q S1 1B.1 SB_CalBG/RSABG Great Basin scrub, Pinyon and juniper woodland Gravelly (sometimes), Shale (sometimes) 2895 2895 9500 9500 1994-01-01
No Photo Available
Geum aleppicum Aleppo avens Rosaceae perennial herb Jun-Aug None None G5 S2 2B.2 Development, Foot traffic/trampling, Grazing, Road/trail construction/maint. Great Basin scrub, Lower montane coniferous forest, Meadows and seeps 450 1500 1475 4920 1994-01-01 Photo of Geum aleppicum
©2015 Barry Breckling
Muhlenbergia appressa appressed muhly Poaceae annual herb Apr-May None None G4 S3 2B.2 Grazing Coastal scrub, Mojavean desert scrub, Valley and foothill grassland Rocky 20 1600 65 5250 1994-01-01 Photo of Muhlenbergia appressa
© 2006 Steve Matson
Acanthoscyphus parishii var. abramsii Abrams' oxytheca Polygonaceae annual herb Jun-Aug None None G4?T1T2 S1S2 1B.2 USFS_S Road/trail construction/maint. Chaparral (sandy, shale) 1143 2057 3750 6750 Yes 1994-01-01 Photo of Acanthoscyphus parishii var. abramsii
© 2007 Steve Matson
Viola palustris alpine marsh violet Violaceae perennial rhizomatous herb Mar-Aug None None G5 S1S2 2B.2 Other, Recreational use (non-ORV) Bogs and fens (coastal), Coastal scrub (mesic) 0 150 0 490 1994-01-01 Photo of Viola palustris
©2021 Scot Loring
Asclepias asperula ssp. asperula antelope-horns Apocynaceae perennial herb May-Sep None None G5T5 S3 4.3 SB_CalBG/RSABG Mojavean desert scrub, Pinyon and juniper woodland Rocky 915 2195 3000 7200 2001-01-01
No Photo Available
Euphorbia abramsiana Abrams' spurge Euphorbiaceae annual herb (Aug)Sep-Nov None None G4 S2 2B.2 SB_CalBG/RSABG Agriculture, Development, Foot traffic/trampling, Grazing, Mining, Non-native plant impacts, ORV activity, Road/trail construction/maint. Mojavean desert scrub, Sonoran desert scrub Sandy -5 1310 -15 4300 2001-01-01
No Photo Available
Dudleya cymosa ssp. agourensis Agoura Hills dudleya Crassulaceae perennial herb May-Jun FT None G5T1 S1 1B.2 SB_CalBG/RSABG; SB_SBBG Development, Erosion/runoff, Foot traffic/trampling, Non-native plant impacts, Road/trail construction/maint., Vandalism/dumping/litter Chaparral, Cismontane woodland Rocky, Volcanic 200 500 655 1640 Yes 1980-01-01 Photo of Dudleya cymosa ssp. agourensis
© 2013 Adam Searcy
Enceliopsis nudicaulis var. corrugata Ash Meadows daisy Asteraceae perennial herb May-Jun FT None G5T1T2Q S1 3.3 Mojavean desert scrub Carbonate, Clay, Gravelly 1235 1405 4050 4610 1980-01-01
No Photo Available
Eriogonum microthecum var. alpinum alpine slender buckwheat Polygonaceae perennial herb Jul-Sep None None G5T3 S3 4.3 Alpine dwarf scrub, Great Basin scrub Gravelly (sometimes), Rocky (sometimes) 2500 3300 8205 10825 Yes 2001-01-01
No Photo Available
Glehnia littoralis ssp. leiocarpa American glehnia Apiaceae perennial herb May-Aug None None G5T5 S2S3 4.2 SB_CalBG/RSABG Coastal dunes 0 20 0 65 2001-01-01 Photo of Glehnia littoralis ssp. leiocarpa
©2017 Steve Matson
Hymenoxys lemmonii alkali hymenoxys Asteraceae perennial herb (May)Jun-Aug(Sep) None None G4 S2S3 2B.2 Great Basin scrub, Lower montane coniferous forest, Meadows and seeps (subalkaline) 240 3390 785 11125 2001-01-01 Photo of Hymenoxys lemmonii
© 2006 Steve Matson
Xanthisma gracile annual bristleweed Asteraceae annual herb Apr-Jul(Sep) None None G5 S4 4.3 SB_CalBG/RSABG Joshua tree "woodland", Mojavean desert scrub 1220 1555 4005 5100 2001-01-01
No Photo Available
Sphaeromeria potentilloides var. nitrophila alkali tansy-sage Asteraceae perennial herb Jun-Jul None None G5T4? S2 2B.2 Meadows and seeps, Playas Alkaline (usually) 2100 2400 6890 7875 2001-01-01
No Photo Available
Tortella alpicola alpine crisp-moss Pottiaceae moss None None G5? S1 2B.3 Cismontane woodland (rocky, volcanic) 1400 1400 4595 4595 2001-01-01
No Photo Available
Astragalus austiniae Austin's astragalus Fabaceae perennial herb (May)Jul-Sep None None G2G3 S2S3 1B.3 SB_UCSC Foot traffic/trampling, Recreational use (non-ORV) Alpine boulder and rock field, Subalpine coniferous forest Rocky 2440 2970 8005 9745 2013-12-04
No Photo Available
Selaginella cinerascens ashy spike-moss Selaginellaceae perennial rhizomatous herb None None G3G4 S3? 4.1 Chaparral, Coastal scrub 20 640 65 2100 1974-01-01
No Photo Available
Digitaria californica var. californica Arizona cottontop Poaceae perennial herb Jul-Nov None None G5T5? S2 2B.3 Improper burning regime, Recreational use (non-ORV) Mojavean desert scrub, Sonoran desert scrub Rocky 290 1490 950 4890 2006-09-14
No Photo Available
Navarretia nigelliformis ssp. nigelliformis adobe navarretia Polemoniaceae annual herb Apr-Jun None None G4T3 S3 4.2 Valley and foothill grassland (vernally mesic), Vernal pools (sometimes) Clay, Serpentine (sometimes) 100 1000 330 3280 Yes 2007-04-02 Photo of Navarretia nigelliformis ssp. nigelliformis
© 2008 Zoya Akulova
Lomatium roseanum adobe lomatium Apiaceae perennial herb May-Jul None None G2G3 S2 1B.2 BLM_S; USFS_S Grazing, Non-native plant impacts, ORV activity, Other, Wood cutting or brush clearing Great Basin scrub, Lower montane coniferous forest Gravelly, Openings, Rocky 1463 2255 4800 7400 2007-08-16
No Photo Available
Rhamnus alnifolia alder buckthorn Rhamnaceae perennial deciduous shrub May-Jul None None G5 S3 2B.2 SB_UCSC Dam/Inundation, Development, Grazing, Logging, Road/trail construction/maint. Lower montane coniferous forest, Meadows and seeps, Riparian scrub, Upper montane coniferous forest 1370 2130 4495 6990 2008-03-26
No Photo Available
Pentachaeta aurea ssp. allenii Allen's pentachaeta Asteraceae annual herb Mar-Jun None None G4T1 S1 1B.1 ORV activity, Other Coastal scrub (openings), Valley and foothill grassland 75 520 245 1705 Yes 2008-05-08 Photo of Pentachaeta aurea ssp. allenii
©2008 Bob Allen
Corispermum americanum var. americanum American bugseed Chenopodiaceae annual herb Apr-May None None G5?T5? S1 2B.2 Non-native plant impacts Desert dunes 880 1160 2885 3805 2009-05-11
No Photo Available
Eriogonum nudum var. psychicola Antioch Dunes buckwheat Polygonaceae perennial herb Jul-Oct None None G5T1 S1 1B.1 Development, Mining Inland dunes 0 20 0 65 Yes 2010-06-21
No Photo Available
Eriogonum umbellatum var. ahartii Ahart's buckwheat Polygonaceae perennial herb Jun-Sep None None G5T3 S3 1B.2 SB_UCSC; USFS_S Erosion/runoff, Logging, Mining, Non-native plant impacts, ORV activity, Other, Recreational use (non-ORV), Road/trail construction/maint., Wood cutting or brush clearing Chaparral, Cismontane woodland Openings, Serpentine, Slopes 400 2000 1310 6560 Yes 2010-11-29
No Photo Available
Riella americana American riella Riellaceae liverwort (aquatic) Aug-Sep None None G2G3 S1 2B.2 Lower montane coniferous forest, Pinyon and juniper woodland 1615 1615 5300 5300 2011-03-23
No Photo Available
Calyptridium arizonicum Arizona pussypaws Montiaceae annual herb Mar-Apr None None G3? S1 2B.1 SB_CalBG/RSABG Foot traffic/trampling, Recreational use (non-ORV) Sonoran desert scrub Metamorphic, Washes 610 790 2000 2590 2011-08-17
No Photo Available
Allium abramsii Abrams' onion Alliaceae perennial bulbiferous herb May-Jul None None G3 S3 1B.2 SB_SBBG Foot traffic/trampling Lower montane coniferous forest, Upper montane coniferous forest Granitic (often) 885 3050 2905 10005 Yes 2012-03-13 Photo of Allium abramsii
© 2018 Steve Matson
Ramalina thrausta angel's hair lichen Ramalinaceae fruticose lichen (epiphytic) None None G5? S2S3 2B.1 Erosion/runoff, Logging, Other North Coast coniferous forest 75 430 245 1410 2014-03-01 Photo of Ramalina thrausta
© 2013 Scot Loring
Almutaster pauciflorus alkali marsh aster Asteraceae perennial herb Jun-Oct None None G4 S1S2 2B.2 SB_CalBG/RSABG Altered flood/tidal/hydrologic regime, Other, Road/trail construction/maint. Meadows and seeps Alkaline 240 800 785 2625 2017-03-14 Photo of Almutaster pauciflorus
© 2014 Richard Spellenberg
Lycium exsertum Arizona desert-thorn Solanaceae perennial shrub Jan-Mar None None G4G5 S1 2B.1 ORV activity Sonoran desert scrub Gravelly, Volcanic 2018-03-14
No Photo Available
Muhlenbergia utilis aparejo grass Poaceae perennial rhizomatous herb Mar-Oct None None G4 S2S3 2B.2 Development, Grazing Chaparral, Cismontane woodland, Coastal scrub, Marshes and swamps, Meadows and seeps Alkaline (sometimes), Serpentine (sometimes) 25 2325 80 7630 2019-07-10
No Photo Available
Lasthenia chrysantha alkali-sink goldfields Asteraceae annual herb Feb-Apr None None G2 S2 1B.1 Agriculture, Development, Grazing, Non-native plant impacts Vernal pools Alkaline 0 200 0 655 Yes 2019-09-30 Photo of Lasthenia chrysantha
© 2009 California State University, Stanislaus
Pedicularis rigginsiae Arroyo de la Cruz lousewort Orobanchaceae perennial herb (hemiparasitic) Jan-May None None G1 S1 1B.1 Wood cutting or brush clearing Chaparral (maritime) Clay 100 155 330 510 Yes 2021-02-17
No Photo Available
Galium argense Argus bedstraw Rubiaceae perennial herb Apr-Jul(Oct) None None G1G2 S1S2 1B.3 Joshua tree "woodland", Pinyon and juniper woodland Granitic, Rocky, Sandy 1275 2410 4185 7905 2023-05-16
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 24 April 2024].