CNPS

CNPS Rare Plant Inventory


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271 matches found. Click on scientific name for details

Search Criteria: Scientific Name starts with S

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
Spermolepis gigantea desert scaleseed Apiaceae annual herb Mar-Apr None None G1 SH 2B.1 Sonoran desert scrub 400 400 1310 1310 1988-01-01
No Photo Available
Saltugilia latimeri Latimer's woodland-gilia Polemoniaceae annual herb Mar-Jun None None G3 S3 1B.2 BLM_S; SB_CalBG/RSABG; SB_USDA; USFS_S Development, Foot traffic/trampling, Grazing, Mining, Non-native animal impacts, ORV activity, Recreational use (non-ORV), Vandalism/dumping/litter Chaparral, Mojavean desert scrub, Pinyon and juniper woodland Granitic (often), Rocky (sometimes), Sandy (sometimes), Washes (sometimes) 400 1900 1310 6235 Yes 2004-01-01
No Photo Available
Sisyrinchium hitchcockii Hitchcock's blue-eyed grass Iridaceae perennial rhizomatous herb Jun None None G1G2 S1 1B.1 Cismontane woodland (openings), Valley and foothill grassland 305 305 1000 1000 2004-01-01 Photo of Sisyrinchium hitchcockii
©2009 Dana York
Sarcocornia utahensis CBR 2004-01-01
No Photo Available
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
Symphyotrichum lentum Suisun Marsh aster Asteraceae perennial rhizomatous herb (Apr)May-Nov None None G2 S2 1B.2 SB_CalBG/RSABG; SB_USDA Biocides, Development, Erosion/runoff, Foot traffic/trampling, Military operations, Non-native plant impacts, Other, Recreational use (non-ORV), Road/trail construction/maint., Waterway bank protection/maintenance Marshes and swamps (brackish, freshwater) 0 3 0 10 Yes 1974-01-01
No Photo Available
Symphyotrichum greatae Greata's aster Asteraceae perennial rhizomatous herb Jun-Oct None None G2 S2 1B.3 SB_CalBG/RSABG Dam/Inundation, Development, Erosion/runoff, Foot traffic/trampling, Non-native plant impacts, Other, Recreational use (non-ORV), Road/trail construction/maint. Broadleafed upland forest, Chaparral, Cismontane woodland, Lower montane coniferous forest, Riparian woodland Mesic 300 2010 985 6595 Yes 1974-01-01 Photo of Symphyotrichum greatae
© 2006 Michael Charters
Senna covesii Cove's cassia Fabaceae perennial herb Mar-Jun(Aug) None None G5 S3 2B.2 SB_CalBG/RSABG Erosion/runoff, Mining, ORV activity, Other, Road/trail construction/maint. Sonoran desert scrub Dry, Sandy, Slopes, Washes 225 1295 740 4250 1980-01-01
No Photo Available
Systenotheca vortriedei Vortriede's spineflower Polygonaceae annual herb May-Sep None None G3 S3 4.3 SB_UCBG Chaparral, Cismontane woodland Sandy (sometimes), Serpentine (sometimes) 500 1600 1640 5250 Yes 1974-01-01
No Photo Available
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
Synthyris missurica ssp. missurica kitten-tails Plantaginaceae perennial rhizomatous herb (May)Jun-Jul(Aug) None None G4G5T4T5 S3 2B.3 SB_BerrySB Foot traffic/trampling, Grazing, Logging, Mining, Other, Recreational use (non-ORV), Road/trail construction/maint. Lower montane coniferous forest, Subalpine coniferous forest, Upper montane coniferous forest 2000 2560 6560 8400 2001-01-01
No Photo Available
Stuckenia filiformis ssp. alpina northern slender pondweed Potamogetonaceae perennial rhizomatous herb (aquatic) May-Jul None None G5T5 S2S3 2B.2 Marshes and swamps (shallow freshwater) 300 2150 985 7055 1994-01-01 Photo of Stuckenia filiformis ssp. alpina
Dana York (2016)
Sagittaria sanfordii Sanford's arrowhead Alismataceae perennial rhizomatous herb (emergent) May-Oct(Nov) None None G3 S3 1B.2 BLM_S Agriculture, Altered flood/tidal/hydrologic regime, Biocides, Dam/Inundation, Development, Erosion/runoff, Feral pigs, Foot traffic/trampling, Grazing, Mining, Non-native plant impacts, Other, Recreational use (non-ORV), Road/trail construction/maint., Surface water diversion, Vandalism/dumping/litter, Waterway bank protection/maintenance Marshes and swamps (shallow freshwater) 0 650 0 2135 Yes 1984-01-01 Photo of Sagittaria sanfordii
©2013 Debra L. Cook
Salix brachycarpa var. brachycarpa short-fruited willow Salicaceae perennial deciduous shrub Jun-Jul None None G5T5 S2 2B.3 Grazing, Recreational use (non-ORV) Alpine dwarf scrub, Meadows and seeps, Subalpine coniferous forest Carbonate 3000 3500 9845 11485 1974-01-01
No Photo Available
Salix delnortensis Del Norte willow Salicaceae perennial deciduous shrub Apr-May None None G4 S4 4.3 Riparian forest (serpentinite) 90 500 295 1640 1974-01-01 Photo of Salix delnortensis
©2017 Steve Matson
Salix nivalis snow willow Salicaceae perennial deciduous shrub Jul-Aug None None G5 S2 2B.3 Other, Recreational use (non-ORV) Alpine dwarf scrub 3100 3500 10170 11485 1984-01-01 Photo of Salix nivalis
© 2009 Steve Matson
Salvia brandegeei Brandegee's sage Lamiaceae perennial evergreen shrub Apr-May None None G3 S2 1B.2 SB_CalBG/RSABG; SB_SBBG Erosion/runoff Chaparral, Closed-cone coniferous forest, Coastal scrub 5 200 15 655 1974-01-01
No Photo Available
Salvia dorrii var. incana fleshy sage Lamiaceae perennial evergreen shrub May-Jul None None G5T4 S2 3 Great Basin scrub, Pinyon and juniper woodland 300 1295 985 4250 1984-01-01 Photo of Salvia dorrii var. incana
©2009 Keir Morse
Salvia eremostachya desert sage Lamiaceae perennial evergreen shrub Mar-May None None G4 S3 4.3 SB_CalBG/RSABG Sonoran desert scrub (gravelly, rocky) 700 1400 2295 4595 1974-01-01
No Photo Available
Salvia funerea Death Valley sage Lamiaceae perennial evergreen shrub Mar-May None None G4 S4 4.3 Mojavean desert scrub (carbonate) 0 1865 0 6120 1974-01-01
No Photo Available
Salvia greatae Orocopia sage Lamiaceae perennial evergreen shrub Mar-Apr None None G2G3 S2S3 1B.3 BLM_S; SB_CalBG/RSABG Foot traffic/trampling, Military operations, ORV activity, Other, Recreational use (non-ORV) Mojavean desert scrub, Sonoran desert scrub -40 825 -130 2705 Yes 1974-01-01
No Photo Available
Salvia munzii Munz's sage Lamiaceae perennial evergreen shrub Feb-Apr None None G2 S2 2B.2 SB_CalBG/RSABG; SB_CRES Development, Foot traffic/trampling, Improper burning regime, Non-native plant impacts, ORV activity, Other, Recreational use (non-ORV), Road/trail construction/maint., Vandalism/dumping/litter Chaparral, Coastal scrub 115 1065 375 3495 1974-01-01
No Photo Available
Sanicula hoffmannii Hoffmann's sanicle Apiaceae perennial herb Mar-May None None G3 S3 4.3 SB_SBBG; SB_UCSC Broadleafed upland forest, Chaparral, Cismontane woodland, Coastal bluff scrub, Coastal scrub, Lower montane coniferous forest Clay (often), Serpentine (often) 30 300 100 985 Yes 1974-01-01
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
Sanicula peckiana Peck's sanicle Apiaceae perennial herb Mar-Jun None None G4 S3 4.3 Chaparral, Lower montane coniferous forest Serpentine (often) 150 800 490 2625 1974-01-01 Photo of Sanicula peckiana
©2017 Steve Matson
Saltugilia caruifolia caraway-leaved woodland-gilia Polemoniaceae annual herb May-Aug None None G4 S4 4.3 SB_CalBG/RSABG Chaparral, Lower montane coniferous forest Openings, Sandy 840 2300 2755 7545 1974-01-01
No Photo Available
Stebbinsoseris decipiens Santa Cruz microseris Asteraceae annual herb Apr-May None None G2 S2 1B.2 SB_CalBG/RSABG; SB_UCSC Feral pigs, Grazing, Improper burning regime, Military operations, Non-native plant impacts, Other, Road/trail construction/maint. Broadleafed upland forest, Chaparral, Closed-cone coniferous forest, Coastal prairie, Coastal scrub, Valley and foothill grassland Openings, Serpentine (sometimes) 10 500 35 1640 Yes 1974-01-01
No Photo Available
Sabulina decumbens Lassics sandwort Caryophyllaceae perennial herb Jul None None G1 S1 1B.2 USFS_S Foot traffic/trampling, Grazing, ORV activity Lower montane coniferous forest, Upper montane coniferous forest Serpentine 1500 1675 4920 5495 Yes 1984-01-01 Photo of Sabulina decumbens
©2018 Jeb Bjerke
Sabulina howellii Howell's sandwort Caryophyllaceae perennial herb Apr-Jul None None G4 S3 1B.3 Foot traffic/trampling, Mining, Other Chaparral, Lower montane coniferous forest Serpentine 550 1000 1805 3280 1980-01-01 Photo of Sabulina howellii
©2015 John Doyen
Sabulina rosei Peanut sandwort Caryophyllaceae perennial herb May-Jul None None G3 S3 4.2 USFS_S Lower montane coniferous forest (serpentinite) 750 1525 2460 5005 Yes 1980-01-01 Photo of Sabulina rosei
©2017 Belinda Lo
Sidalcea hickmanii ssp. viridis Marin checkerbloom Malvaceae perennial herb May-Jun None None G2TH SH 1B.1 Foot traffic/trampling, Improper burning regime Chaparral (serpentinite) 50 430 165 1410 Yes 1974-01-01
No Photo Available
Sidalcea keckii Keck's checkerbloom Malvaceae annual herb Apr-May(Jun) FE None G2 S2 1B.1 SB_CalBG/RSABG Agriculture, Development, Grazing, Non-native plant impacts, Other, Road/trail construction/maint. Cismontane woodland, Valley and foothill grassland Clay, Serpentine 75 650 245 2135 Yes 1974-01-01
No Photo Available
Sidalcea oregana ssp. valida Kenwood Marsh checkerbloom Malvaceae perennial rhizomatous herb Jun-Sep FE CE G5T1 S1 1B.1 SB_CalBG/RSABG; SB_UCBG Agriculture, Foot traffic/trampling, Grazing, Non-native plant impacts, Other, Surface water diversion Marshes and swamps (freshwater) 115 150 375 490 Yes 1974-01-01
No Photo Available
Sidalcea pedata bird-foot checkerbloom Malvaceae perennial herb May-Aug FE CE G1 S1 1B.1 SB_CalBG/RSABG Altered flood/tidal/hydrologic regime, Biocides, Dam/Inundation, Development, Erosion/runoff, Foot traffic/trampling, Grazing, 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 (mesic), Pebble (Pavement) plain 1600 2500 5250 8205 Yes 1974-01-01
No Photo Available
Sidalcea robusta Butte County checkerbloom Malvaceae perennial rhizomatous herb Apr-Jun None None G2 S2 1B.2 BLM_S; SB_UCSC Agriculture, Biocides, Development, Erosion/runoff, Foot traffic/trampling, Grazing, Improper burning regime, Non-native plant impacts, ORV activity, Other, Recreational use (non-ORV), Road/trail construction/maint. Chaparral, Cismontane woodland 90 1600 295 5250 Yes 1974-01-01 Photo of Sidalcea robusta
© 2010 George W Hartwell
Sidalcea stipularis Scadden Flat checkerbloom Malvaceae perennial rhizomatous herb Jul-Aug None CE G1 S1 1B.1 SB_CalBG/RSABG Altered flood/tidal/hydrologic regime, Biocides, Grazing, Non-native plant impacts, Other, Road/trail construction/maint. Marshes and swamps (montane freshwater) 700 730 2295 2395 Yes 1980-01-01
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
Stipa divaricata small-flowered rice grass Poaceae perennial herb Jun-Sep None None G5 S2 2B.3 Pinyon and juniper woodland (gravelly, carbonate) 700 2950 2295 9680 1974-01-01
No Photo Available
Sidotheca caryophylloides chickweed oxytheca Polygonaceae annual herb Jul-Sep(Oct) None None G4 S4 4.3 USFS_S Lower montane coniferous forest (sandy) 1114 2600 3655 8530 Yes 1980-01-01 Photo of Sidotheca caryophylloides
©2021 Keir Morse
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
Sedella leiocarpa Lake County stonecrop Crassulaceae annual herb Apr-May FE CE G1 S1 1B.1 Agriculture, Disking, Grazing, Non-native plant impacts, Other, Road/trail construction/maint. Cismontane woodland, Valley and foothill grassland, Vernal pools Vernally Mesic, Volcanic 365 790 1200 2590 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
Streptanthus brachiatus ssp. hoffmanii Freed's jewelflower Brassicaceae perennial herb May-Jul None None G2T2 S2 1B.2 BLM_S Erosion/runoff, Mining, Other, Recreational use (non-ORV), Road/trail construction/maint. Chaparral, Cismontane woodland Serpentine 490 1220 1610 4005 Yes 1994-01-01
No Photo Available
Streptanthus campestris southern jewelflower Brassicaceae perennial herb (Apr)May-Jul None None G3 S3 1B.3 BLM_S; SB_CRES; USFS_S Development, Foot traffic/trampling, Other, Recreational use (non-ORV), Road/trail construction/maint., Wood cutting or brush clearing Chaparral, Lower montane coniferous forest, Pinyon and juniper woodland Rocky 900 2300 2955 7545 1994-01-01
No Photo Available
Streptanthus morrisonii ssp. elatus Three Peaks jewelflower Brassicaceae perennial herb Jun-Sep None None G2T1 S1 1B.2 BLM_S Improper burning regime, ORV activity Chaparral (serpentinite) 90 815 295 2675 Yes 1974-01-01
No Photo Available
Streptanthus morrisonii ssp. hirtiflorus Dorr's Cabin jewelflower Brassicaceae perennial herb Jun None None G2T1 S1 1B.2 Mining Chaparral, Closed-cone coniferous forest Serpentine 185 820 605 2690 Yes 1974-01-01
No Photo Available
Streptanthus morrisonii ssp. kruckebergii Kruckeberg's jewelflower Brassicaceae perennial herb Apr-Jul None None G2T1 S1 1B.2 BLM_S Mining, Other Cismontane woodland (serpentinite) 215 1035 705 3395 Yes 1994-01-01
No Photo Available
Streptanthus morrisonii ssp. morrisonii Morrison's jewelflower Brassicaceae perennial herb May-Sep None None G2T1? S1? 1B.2 BLM_S Chaparral (rocky, serpentinite, talus) 120 585 395 1920 Yes 1974-01-01
No Photo Available
Sabulina stolonifera Scott Mountain sandwort Caryophyllaceae perennial stoloniferous herb May-Aug None None G2 S2 1B.3 SB_CalBG/RSABG; USFS_S Road/trail construction/maint. Lower montane coniferous forest (serpentinite) 1250 1400 4100 4595 Yes 1994-01-01 Photo of Sabulina stolonifera
©2013 Julie Kierstead Nelson
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
Sanicula tracyi Tracy's sanicle Apiaceae perennial herb Apr-Jul None None G4 S4 4.2 USFS_S Development, Grazing, Improper burning regime, Logging, Non-native plant impacts, Road/trail construction/maint. Cismontane woodland, Lower montane coniferous forest, Upper montane coniferous forest Openings 100 1585 330 5200 Yes 1974-01-01 Photo of Sanicula tracyi
©2014 Zoya Akulova
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)
Saxifraga cespitosa tufted saxifrage Saxifragaceae perennial herb Jun-Sep None None G5 S1 2B.3 Meadows and seeps (mesic, rocky) 915 1980 3000 6495 1988-01-01 Photo of Saxifraga cespitosa
© 2021 Scot Loring
Saxifraga rufidula CBR 1988-01-01
No Photo Available
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
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)
Sclerocactus polyancistrus Mojave fish-hook cactus Cactaceae perennial stem Apr-Jul None None G3 S3 4.2 IUCN_LC; SB_CalBG/RSABG Great Basin scrub, Joshua tree "woodland", Mojavean desert scrub Carbonate (usually) 640 2320 2100 7610 1974-01-01
No Photo Available
Scleropogon brevifolius burro grass Poaceae perennial stoloniferous herb Oct None None G5 S1S2 2B.3 Development, Grazing, Mining, ORV activity, Road/trail construction/maint. Joshua tree "woodland", Mojavean desert scrub (decomposed granitic) 1360 1600 4460 5250 1984-01-01
No Photo Available
Scrophularia atrata black-flowered figwort Scrophulariaceae perennial herb Mar-Jul None None G2? S2? 1B.2 SB_CalBG/RSABG Altered flood/tidal/hydrologic regime, Development, Erosion/runoff, Foot traffic/trampling, Grazing, Landfill, Mining, Other, Road/trail construction/maint., Vandalism/dumping/litter, Wood cutting or brush clearing Chaparral, Closed-cone coniferous forest, Coastal dunes, Coastal scrub, Riparian scrub 10 500 35 1640 Yes 1974-01-01
No Photo Available
Scrophularia villosa Santa Catalina figwort Scrophulariaceae perennial shrub Apr-Aug None None G3 S3 1B.2 SB_CalBG/RSABG Chaparral, Coastal scrub 45 510 150 1675 Yes 1974-01-01
No Photo Available
Scutellaria holmgreniorum Holmgren's skullcap Lamiaceae perennial rhizomatous herb May-Jul None None G3Q S3 3.3 Grazing Great Basin scrub, Pinyon and juniper woodland Clay, Volcanic 1310 1735 4300 5695 1984-01-01
No Photo Available
Sedum albomarginatum Feather River stonecrop Crassulaceae perennial herb May-Jun None None G2 S2 1B.2 SB_UCSC; USFS_S Erosion/runoff, Improper burning regime, Logging, Mining, Road/trail construction/maint. Chaparral, Lower montane coniferous forest Serpentine 260 1950 855 6400 Yes 1980-01-01
No Photo Available
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
Sedum flavidum pale yellow stonecrop Crassulaceae perennial herb May-Jul None None G3 S3 4.3 SB_CalBG/RSABG Grazing, Logging, Mining, Other, Road/trail construction/maint. Broadleafed upland forest, Chaparral, Lower montane coniferous forest, Upper montane coniferous forest Openings, Rocky, Serpentine, Talus, Volcanic 355 2155 1165 7070 Yes 1980-01-01 Photo of Sedum flavidum
©2012 Julie Kierstead Nelson
Sedum laxum ssp. heckneri Heckner's stonecrop Crassulaceae perennial herb Jun-Jul None None G5?T4 S4 4.3 Lower montane coniferous forest, Upper montane coniferous forest Gabbroic (sometimes), Serpentine (sometimes) 100 2100 330 6890 1980-01-01 Photo of Sedum laxum ssp. heckneri
© 2010 Susan Erwin
Sedum niveum Davidson's stonecrop Crassulaceae perennial rhizomatous herb Jun-Aug None None G3 S3 4.2 SB_CalBG/RSABG; USFS_S Lower montane coniferous forest, Subalpine coniferous forest, Upper montane coniferous forest Rocky 2075 3000 6810 9845 1974-01-01
No Photo Available
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
Sedum paradisum ssp. paradisum Canyon Creek stonecrop Crassulaceae perennial herb May-Jun None None G3G4T3 S3 1B.3 BLM_S; SB_UCSC; USFS_S Foot traffic/trampling, Improper burning regime, Logging, Other, Recreational use (non-ORV), Road/trail construction/maint., Wood cutting or brush clearing Broadleafed upland forest, Chaparral, Lower montane coniferous forest, Subalpine coniferous forest Granitic, Rocky 300 1900 985 6235 Yes 1980-01-01 Photo of Sedum paradisum ssp. paradisum
©2018 Julie Kierstead Nelson
Selaginella leucobryoides Mojave spike-moss Selaginellaceae perennial rhizomatous herb Jun None None G4 S3S4 4.3 Great Basin scrub, Lower montane coniferous forest, Mojavean desert scrub, Pinyon and juniper woodland Carbonate (usually), Rocky 600 3150 1970 10335 Yes 1974-01-01
No Photo Available
Senecio clevelandii var. clevelandii Cleveland's ragwort Asteraceae perennial herb Jun-Jul None None G4?T3Q S3 4.3 Chaparral (seeps, serpentinite) 365 900 1200 2955 Yes 1980-01-01
No Photo Available
Senecio hydrophiloides sweet marsh ragwort Asteraceae perennial herb May-Aug None None G5 S4 4.2 Lower montane coniferous forest, Meadows and seeps Mesic 0 2800 0 9185 1984-01-01 Photo of Senecio hydrophiloides
© 2021 Scot Loring
Senecio pattersonensis Mt. Patterson senecio Asteraceae perennial rhizomatous herb Jul-Aug(Sep) None None G3 S3 1B.3 SB_SBBG; USFS_S Alpine boulder and rock field 2900 3720 9515 12205 1980-01-01
No Photo Available
Sibara filifolia Santa Cruz Island winged-rockcress Brassicaceae annual herb (Feb)Mar-Apr FE None G2 S2 1B.1 SB_CalBG/RSABG; SB_SBBG Foot traffic/trampling Coastal scrub (rocky, volcanic) Openings (often) 60 305 195 1000 Yes 1974-01-01 Photo of Sibara filifolia
© 2008 Kim M Klementowski
Sidalcea covillei Owens Valley checkerbloom Malvaceae perennial herb Apr-Jun None CE G2 S2 1B.1 BLM_S; SB_SBBG Altered flood/tidal/hydrologic regime, Dam/Inundation, Development, Foot traffic/trampling, Grazing, Groundwater pumping, Non-native plant impacts, ORV activity, Other, Road/trail construction/maint., Vandalism/dumping/litter Chenopod scrub, Meadows and seeps Alkaline, Mesic 1095 1415 3595 4645 Yes 1974-01-01 Photo of Sidalcea covillei
© 2001 Larry Blakely
Sidalcea hickmanii ssp. anomala Cuesta Pass checkerbloom Malvaceae perennial herb May-Jun None CR G2T1 S1 1B.2 SB_CalBG/RSABG; SB_SBBG; USFS_S Development, Erosion/runoff, Feral pigs, Grazing, Improper burning regime, Military operations, Non-native plant impacts, ORV activity, Recreational use (non-ORV), Road/trail construction/maint. Chaparral, Closed-cone coniferous forest Rocky, Serpentine 600 800 1970 2625 Yes 1974-01-01
No Photo Available
Sidalcea hickmanii ssp. hickmanii Hickman's checkerbloom Malvaceae perennial herb May-Jul None None G2T2 S2 1B.3 SB_SBBG; USFS_S Feral pigs, Foot traffic/trampling, Grazing, Military operations, Non-native plant impacts, Other, Road/trail construction/maint., Wood cutting or brush clearing Chaparral (openings), Cismontane woodland, Coastal bluff scrub 335 1220 1100 4005 Yes 1974-01-01
No Photo Available
Sidalcea hickmanii ssp. parishii Parish's checkerbloom Malvaceae perennial herb (May)Jun-Aug None CR G2T1 S1 1B.2 SB_CalBG/RSABG; SB_SBBG; USFS_S Biocides, Development, Erosion/runoff, Foot traffic/trampling, Grazing, 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 1000 2499 3280 8200 Yes 1974-01-01
No Photo Available
Silene marmorensis Marble Mountain campion Caryophyllaceae perennial herb Jun-Aug None None G2 S2 1B.2 Biocides, Foot traffic/trampling, Grazing, Improper burning regime, Logging, Mining, Other, Recreational use (non-ORV), Road/trail construction/maint., Wood cutting or brush clearing Broadleafed upland forest, Chaparral, Cismontane woodland, Lower montane coniferous forest 170 1250 560 4100 Yes 1980-01-01 Photo of Silene marmorensis
©2021 Dana York
Silene occidentalis ssp. longistipitata long-stiped campion Caryophyllaceae perennial herb Jun-Aug None None G4T2Q S2 1B.2 SB_UCSC; USFS_S Biocides, Foot traffic/trampling, Grazing, Logging, Other, Recreational use (non-ORV), Road/trail construction/maint. Chaparral, Lower montane coniferous forest, Upper montane coniferous forest 1000 2000 3280 6560 Yes 1984-01-01 Photo of Silene occidentalis ssp. longistipitata
© 2013 Kirsten Bovee
Silene suksdorfii Cascade alpine campion Caryophyllaceae perennial herb Jul-Sep None None G4 S3 2B.3 SB_UCSC Logging Alpine boulder and rock field, Subalpine coniferous forest, Upper montane coniferous forest Rocky, Volcanic 2355 3110 7725 10205 1988-01-01 Photo of Silene suksdorfii
©2008 Shawn DeCew
Silene verecunda ssp. verecunda San Francisco campion Caryophyllaceae perennial herb (Feb)Mar-Jul(Aug) None None G5T1 S1 1B.2 SB_CalBG/RSABG; SB_UCSC Development, Erosion/runoff, Foot traffic/trampling, Grazing, Non-native plant impacts, Other, Recreational use (non-ORV) Chaparral, Coastal bluff scrub, Coastal prairie, Coastal scrub, Valley and foothill grassland Sandy 30 645 100 2115 Yes 1980-01-01
No Photo Available
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
Smilax jamesii English Peak greenbrier Smilacaceae perennial rhizomatous herb May-Jul(Aug-Oct) None None G3G4 S3S4 4.2 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., Surface water diversion Broadleafed upland forest, Lower montane coniferous forest, Marshes and swamps, North Coast coniferous forest, Upper montane coniferous forest Lake Margins, Mesic (sometimes), Streambanks 505 1975 1655 6480 Yes 1980-01-01 Photo of Smilax jamesii
Sheli Wingo 2004
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
Sparganium natans small bur-reed Typhaceae perennial rhizomatous herb (emergent) Jun-Sep None None G5 S3 4.3 IUCN_LC Bogs and fens, Marshes and swamps (lake margins), Meadows and seeps 1625 2500 5330 8205 1988-01-01 Photo of Sparganium natans
© 2009 Keir Morse
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
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
Sphenopholis obtusata prairie wedge grass Poaceae perennial herb Apr-Jul None None G5 S2 2B.2 Non-native plant impacts, Recreational use (non-ORV), Vandalism/dumping/litter Cismontane woodland, Meadows and seeps Mesic 300 2000 985 6560 1974-01-01
No Photo Available
Stipa arida Mormon needle grass Poaceae perennial herb May-Jul None None G5 S3? 2B.3 SB_CalBG/RSABG; SB_USDA Development, Grazing, Mining, Non-native plant impacts, ORV activity, Road/trail construction/maint. Joshua tree "woodland", Pinyon and juniper woodland Carbonate 500 2570 1640 8430 1974-01-01
No Photo Available
Stipa diegoensis San Diego County needle grass Poaceae perennial herb Feb-Jun None None G4 S4 4.2 SB_CRES Chaparral, Coastal scrub Mesic (often), Rocky 10 800 35 2625 1974-01-01
No Photo Available
Stipa lemmonii var. pubescens pubescent needle grass Poaceae perennial herb May-Jul None None G5T1?Q S1? 3.2 Chaparral, Lower montane coniferous forest Serpentine 1030 1315 3380 4315 Yes 1994-01-01
No Photo Available
Streptanthus albidus ssp. albidus Metcalf Canyon jewelflower Brassicaceae annual herb Apr-Jul FE None G2T1 S1 1B.1 SB_CalBG/RSABG; SB_UCBG Biocides, Development, Foot traffic/trampling, Grazing, Mining, Non-native plant impacts, ORV activity, Other, Road/trail construction/maint., Vandalism/dumping/litter Valley and foothill grassland (serpentinite) 45 800 150 2625 Yes 1974-01-01 Photo of Streptanthus albidus ssp. albidus
© 2015 Aaron Schusteff
Streptanthus albidus ssp. peramoenus most beautiful jewelflower Brassicaceae annual herb (Mar)Apr-Sep(Oct) None None G2T2 S2 1B.2 SB_CalBG/RSABG; SB_UCBG; USFS_S Development, Erosion/runoff, Feral pigs, Foot traffic/trampling, Grazing, Improper burning regime, Insufficient population/stand size, Landfill, Military operations, Mining, Non-native plant impacts, ORV activity, Other, Over-collecting/poaching, Recreational use (non-ORV), Road/trail construction/maint., Vandalism/dumping/litter, Waterway bank protection/maintenance Chaparral, Cismontane woodland, Valley and foothill grassland Serpentine 95 1000 310 3280 Yes 1988-01-01 Photo of Streptanthus albidus ssp. peramoenus
© 1994 Robert E. Preston, Ph.D.
Streptanthus batrachopus Tamalpais jewelflower Brassicaceae annual herb Apr-Jul None None G2 S2 1B.3 SB_UCSC Foot traffic/trampling, Other, Recreational use (non-ORV) Chaparral, Closed-cone coniferous forest Serpentine 305 650 1000 2135 Yes 1974-01-01 Photo of Streptanthus batrachopus
© 2012 Aaron Schusteff
Streptanthus bernardinus Laguna Mountains jewelflower Brassicaceae perennial herb May-Aug None None G3G4 S3S4 4.3 SB_CalBG/RSABG Development, Logging, Non-native plant impacts, ORV activity, Recreational use (non-ORV), Road/trail construction/maint. Chaparral, Lower montane coniferous forest 670 2500 2200 8205 Yes 1980-01-01
No Photo Available
Streptanthus brachiatus ssp. brachiatus Socrates Mine jewelflower Brassicaceae perennial herb May-Jun None None G2T1 S1 1B.2 BLM_S Development, Mining, ORV activity, Road/trail construction/maint. Chaparral, Closed-cone coniferous forest Serpentine (usually) 545 1000 1790 3280 Yes 1980-01-01
No Photo Available
Streptanthus callistus Mt. Hamilton jewelflower Brassicaceae annual herb Apr-May None None G1 S1 1B.2 Erosion/runoff, Non-native plant impacts, Road/trail construction/maint. Chaparral, Cismontane woodland 600 790 1970 2590 Yes 1974-01-01 Photo of Streptanthus callistus
© 2012 Aaron Schusteff
Streptanthus cordatus var. piutensis Piute Mountains jewelflower Brassicaceae perennial herb May-Jul None None G5T1 S1 1B.2 BLM_S; SB_CalBG/RSABG; USFS_S Development, Other, Road/trail construction/maint. Broadleafed upland forest, Closed-cone coniferous forest, Pinyon and juniper woodland Clay (sometimes), Metamorphic (sometimes) 1095 1825 3595 5990 Yes 1980-01-01
No Photo Available
Streptanthus drepanoides sickle-fruit jewelflower Brassicaceae annual herb Apr-Jun None None G4 S4 4.3 Chaparral, Cismontane woodland, Lower montane coniferous forest Serpentine 275 1660 900 5445 Yes 1988-01-01 Photo of Streptanthus drepanoides
©2012 Julie Kierstead Nelson
Streptanthus farnsworthianus Farnsworth's jewelflower Brassicaceae annual herb May-Jun None None G4 S4 4.3 SB_CalBG/RSABG Cismontane woodland 400 1400 1310 4595 Yes 1974-01-01 Photo of Streptanthus farnsworthianus
© 2010 Aaron Schusteff
Streptanthus fenestratus Tehipite Valley jewelflower Brassicaceae annual herb (Apr)May-Jul None None G2 S2 1B.1 SB_SBBG; USFS_S Foot traffic/trampling, Other, Road/trail construction/maint. Lower montane coniferous forest, Upper montane coniferous forest 1065 1750 3495 5740 Yes 1980-01-01 Photo of Streptanthus fenestratus
© 2011 Aaron Schusteff
Streptanthus glandulosus ssp. pulchellus Mt. Tamalpais bristly jewelflower Brassicaceae annual herb May-Jul(Aug) None None G4T2 S2 1B.2 SB_CalBG/RSABG Dam/Inundation, Erosion/runoff, Foot traffic/trampling, Grazing, Non-native plant impacts, Other, Recreational use (non-ORV), Road/trail construction/maint., Wood cutting or brush clearing Chaparral, Valley and foothill grassland Serpentine 150 800 490 2625 Yes 1980-01-01
No Photo Available
Streptanthus glandulosus ssp. hoffmanii Hoffman's bristly jewelflower Brassicaceae annual herb Mar-Jul None None G4T2 S2 1B.3 SB_UCSC Erosion/runoff, Logging, Road/trail construction/maint. Chaparral, Cismontane woodland, Valley and foothill grassland (often serpentinite) Rocky 120 475 395 1560 Yes 1980-01-01
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 hispidus Mt. Diablo jewelflower Brassicaceae annual herb Mar-Jun None None G2 S2 1B.3 SB_CalBG/RSABG Foot traffic/trampling, Non-native animal impacts, Non-native plant impacts, Other, Recreational use (non-ORV), Road/trail construction/maint. Chaparral, Valley and foothill grassland Rocky 365 1200 1200 3935 Yes 1974-01-01 Photo of Streptanthus hispidus
© 2011 Aaron Schusteff
Streptanthus howellii Howell's jewelflower Brassicaceae perennial herb Jul-Aug None None G2G3 S2 1B.2 USFS_S Improper burning regime, Mining, Other, Road/trail construction/maint., Wood cutting or brush clearing Lower montane coniferous forest (rocky, serpentinite) 305 1500 1000 4920 1980-01-01 Photo of Streptanthus howellii
©Rick York and CNPS
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
Streptanthus glandulosus ssp. niger Tiburon jewelflower Brassicaceae annual herb May-Jun FE CE G4T1 S1 1B.1 SB_CalBG/RSABG; SB_UCBG Development, Erosion/runoff, Foot traffic/trampling, Non-native plant impacts, Other, Recreational use (non-ORV), Road/trail construction/maint. Valley and foothill grassland (serpentinite) 30 150 100 490 Yes 1974-01-01
No Photo Available
Streptanthus oliganthus Masonic Mountain jewelflower Brassicaceae perennial herb Jun-Jul None None G3 S3 1B.2 BLM_S; USFS_S Erosion/runoff, Improper burning regime, Military operations, Mining, Road/trail construction/maint. Pinyon and juniper woodland (granitic, rocky, volcanic) 1980 3050 6495 10005 1974-01-01
No Photo Available
Suaeda californica California seablite Chenopodiaceae perennial evergreen shrub Jul-Oct FE None G1 S1 1B.1 SB_CalBG/RSABG Development, Erosion/runoff, Foot traffic/trampling, Non-native plant impacts, ORV activity, Other, Road/trail construction/maint. Marshes and swamps (coastal salt) 0 15 0 50 Yes 1988-01-01
No Photo Available
Suaeda esteroa estuary seablite Chenopodiaceae perennial herb (Jan-May)Jul-Oct None None G3 S2 1B.2 Development, Non-native plant impacts, Other, Road/trail construction/maint. Marshes and swamps (coastal salt) 0 5 0 15 1984-01-01
No Photo Available
Swallenia alexandrae Eureka Valley dune grass Poaceae perennial rhizomatous herb Apr-Jun FT CR G2 S2 1B.2 SB_CalBG/RSABG ORV activity Desert dunes 850 1280 2790 4200 Yes 1974-01-01
No Photo Available
Syntrichopappus lemmonii Lemmon's syntrichopappus Asteraceae annual herb Apr-May(Jun) None None G4 S4 4.3 SB_CalBG/RSABG Chaparral, Joshua tree "woodland", Pinyon and juniper woodland Gravelly (sometimes), Sandy (sometimes) 500 1830 1640 6005 Yes 1974-01-01
No Photo Available
Salix bebbiana Bebb's willow Salicaceae perennial deciduous tree May None None G5 S2S3 2B.3 IUCN_LC Recreational use (non-ORV) Marshes and swamps (lake margins, streambanks), Riparian scrub 1200 2230 3935 7315 1994-01-01 Photo of Salix bebbiana
© 2021 Jennifer J. Whipple
Sanguisorba officinalis great burnet Rosaceae perennial rhizomatous herb Jul-Oct None None G5? S2 2B.2 Development, Erosion/runoff, Foot traffic/trampling, Grazing, Logging, Mining, Non-native plant impacts, Other, Recreational use (non-ORV) Bogs and fens, Broadleafed upland forest, Marshes and swamps, Meadows and seeps, North Coast coniferous forest, Riparian forest Serpentine (often) 60 1400 195 4595 1994-01-01 Photo of Sanguisorba officinalis
©2006 Dr. Amadej Trnkoczy
Schoenoplectus heterochaetus slender bulrush Cyperaceae perennial rhizomatous herb Aug None None G5 S1 2B.1 IUCN_LC Lower montane coniferous forest, Marshes and swamps (lake margins) 1600 1600 5250 5250 1994-01-01
No Photo Available
Scutellaria bolanderi ssp. austromontana southern mountains skullcap Lamiaceae perennial rhizomatous herb Jun-Aug None None G4T3 S3 1B.2 SB_CalBG/RSABG; USFS_S Foot traffic/trampling, Grazing, Logging Chaparral, Cismontane woodland, Lower montane coniferous forest Mesic 425 2000 1395 6560 Yes 1994-01-01
No Photo Available
Scutellaria galericulata marsh skullcap Lamiaceae perennial rhizomatous herb Jun-Sep None None G5 S2 2B.2 Altered flood/tidal/hydrologic regime, Development, Erosion/runoff, Foot traffic/trampling, Grazing, Non-native plant impacts, Other, Recreational use (non-ORV), Surface water diversion, Wood cutting or brush clearing Lower montane coniferous forest, Marshes and swamps, Meadows and seeps (mesic) 0 2100 0 6890 1994-01-01 Photo of Scutellaria galericulata
© 2021 Scot Loring
Scutellaria lateriflora side-flowering skullcap Lamiaceae perennial rhizomatous herb Jul-Sep None None G5 S1S2 2B.2 IUCN_LC Recreational use (non-ORV) Marshes and swamps, Meadows and seeps (mesic) 0 500 0 1640 1994-01-01
No Photo Available
Sedum divergens Cascade stonecrop Crassulaceae perennial herb Jul-Sep None None G5? S2 2B.3 Alpine boulder and rock field 1600 2330 5250 7645 1994-01-01 Photo of Sedum divergens
© 2021 Scot Loring
Selaginella asprella bluish spike-moss Selaginellaceae perennial rhizomatous herb Jul None None G4 S4 4.3 Cismontane woodland, Lower montane coniferous forest, Pinyon and juniper woodland, Subalpine coniferous forest, Upper montane coniferous forest Granitic, Rocky 1600 2700 5250 8860 1974-01-01
No Photo Available
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
Selaginella eremophila desert spike-moss Selaginellaceae perennial rhizomatous herb (May)Jun(Jul) None None G4 S2S3 2B.2 Development, Foot traffic/trampling, Non-native plant impacts, ORV activity, Road/trail construction/maint. Chaparral, Sonoran desert scrub (gravelly, rocky) 200 1295 655 4250 1994-01-01
No Photo Available
Senecio aphanactis chaparral ragwort Asteraceae annual herb Jan-Apr(May) None None G3 S2 2B.2 SB_CalBG/RSABG; SB_CRES Development, Erosion/runoff, Feral pigs, Foot traffic/trampling, Grazing, Improper burning regime, Military operations, Non-native plant impacts, ORV activity, Other, Recreational use (non-ORV), Road/trail construction/maint., Wood cutting or brush clearing Chaparral, Cismontane woodland, Coastal scrub Alkaline (sometimes) 15 800 50 2625 1994-01-01
No Photo Available
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
Sidalcea calycosa ssp. rhizomata Point Reyes checkerbloom Malvaceae perennial rhizomatous herb Apr-Sep None None G5T2 S2 1B.2 Altered flood/tidal/hydrologic regime, Development, Foot traffic/trampling, Grazing, Mining, Non-native plant impacts, Other, Recreational use (non-ORV), Road/trail construction/maint. Marshes and swamps (freshwater, near coast) 3 75 10 245 Yes 1994-01-01
No Photo Available
Sidalcea malachroides maple-leaved checkerbloom Malvaceae perennial herb (Mar)Apr-Aug None None G3 S3 4.2 Altered flood/tidal/hydrologic regime, Biocides, Development, Foot traffic/trampling, Grazing, Improper burning regime, Logging, Mining, Non-native plant impacts, ORV activity, Other, Recreational use (non-ORV), Road/trail construction/maint. Broadleafed upland forest, Coastal prairie, Coastal scrub, North Coast coniferous forest, Riparian woodland Disturbed areas (often) 0 730 0 2395 1994-01-01 Photo of Sidalcea malachroides
©2005 Dean Wm. Taylor
Sidalcea malviflora ssp. patula Siskiyou checkerbloom Malvaceae perennial rhizomatous herb (Mar-Apr)May-Aug None None G4G5T2 S2 1B.2 SB_UCSC Agriculture, Biocides, Development, Foot traffic/trampling, Grazing, Logging, Non-native plant impacts, ORV activity, Other, Road/trail construction/maint., Vandalism/dumping/litter Coastal bluff scrub, Coastal prairie, North Coast coniferous forest Roadsides (often) 15 1230 50 4035 1994-01-01 Photo of Sidalcea malviflora ssp. patula
©2004 Dean Wm. Taylor
Sidalcea neomexicana salt spring checkerbloom Malvaceae perennial herb Mar-Jun None None G4 S2 2B.2 USFS_S Development Chaparral, Coastal scrub, Lower montane coniferous forest, Mojavean desert scrub, Playas Alkaline, Mesic 15 1530 50 5020 1994-01-01
No Photo Available
Sidalcea oregana ssp. eximia coast checkerbloom Malvaceae perennial herb Jun-Aug None None G5T1 S1 1B.2 Biocides, Development, Foot traffic/trampling, Grazing, Logging, Non-native plant impacts, Other, Road/trail construction/maint. Lower montane coniferous forest, Meadows and seeps, North Coast coniferous forest 5 1340 15 4395 Yes 1994-01-01
No Photo Available
Sidalcea oregana ssp. hydrophila marsh checkerbloom Malvaceae perennial herb (Jun)Jul-Aug None None G5T2 S2 1B.2 SB_UCSC Agriculture, Foot traffic/trampling, Grazing, ORV activity, Over-collecting/poaching, Recreational use (non-ORV) Meadows and seeps, Riparian forest Mesic 1100 2300 3610 7545 Yes 1974-01-01
No Photo Available
Solidago gigantea CBR 1994-01-01
No Photo Available
Solidago guiradonis Guirado's goldenrod Asteraceae perennial rhizomatous herb Sep-Oct None None G3 S3 4.3 Cismontane woodland, Valley and foothill grassland Seeps, Serpentine 600 1370 1970 4495 Yes 1994-01-01
No Photo Available
Stellaria longifolia long-leaved starwort Caryophyllaceae perennial rhizomatous herb May-Aug None None G5 S2 2B.2 Altered flood/tidal/hydrologic regime, Foot traffic/trampling, Grazing, Logging, Road/trail construction/maint., Waterway bank protection/maintenance Bogs and fens, Meadows and seeps (mesic), Riparian woodland, Upper montane coniferous forest 900 1830 2955 6005 1994-01-01 Photo of Stellaria longifolia
©2016 Keir Morse
Stylocline citroleum oil neststraw Asteraceae annual herb Mar-Apr None None G3 S3 1B.1 BLM_S Altered flood/tidal/hydrologic regime, Mining, Other, Road/trail construction/maint. Chenopod scrub, Coastal scrub, Valley and foothill grassland Clay 50 400 165 1310 Yes 1994-01-01
No Photo Available
Stylocline masonii Mason's neststraw Asteraceae annual herb Mar-May None None G1 S1 1B.1 USFS_S Dam/Inundation, Development Chenopod scrub, Pinyon and juniper woodland Sandy 100 1200 330 3935 Yes 1994-01-01
No Photo Available
Stylocline sonorensis mesquite neststraw Asteraceae annual herb Apr None None G3G5 SX 2A Development Sonoran desert scrub (sandy) 425 425 1395 1395 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
Solanum clokeyi island nightshade Solanaceae perennial herb Mar-Jul None None G3 S3 4.2 Chaparral, Cismontane woodland, Coastal scrub 2 395 5 1295 1980-01-01
No Photo Available
Stipa exigua little ricegrass Poaceae perennial herb Jun-Aug None None G4G5 S2 2B.3 BLM_S Grazing Great Basin scrub 2345 2420 7695 7940 2001-01-01 Photo of Stipa exigua
©2011 Steve Matson
Schoenus nigricans black bog-rush Cyperaceae perennial herb Aug-Sep None None G4 S2 2B.2 IUCN_LC; USFS_S Groundwater pumping, Non-native plant impacts, ORV activity, Road/trail construction/maint., Surface water diversion Marshes and swamps (often alkaline) 150 2000 490 6560 2001-01-01
No Photo Available
Scirpus pendulus pendulous bulrush Cyperaceae perennial rhizomatous herb Jun-Aug None None G5 S1 2B.2 IUCN_LC Marshes and swamps (freshwater), Meadows and seeps (mesic) 800 1000 2625 3280 2001-01-01 Photo of Scirpus pendulus
Keir Morse (2008)
Sclerocactus johnsonii Johnson's bee-hive cactus Cactaceae perennial stem Apr-May None None G3 S2 2B.2 IUCN_LC; SB_CalBG/RSABG Development, Non-native plant impacts, ORV activity, Over-collecting/poaching, Recreational use (non-ORV), Vandalism/dumping/litter Mojavean desert scrub (granitic) 500 1200 1640 3935 2001-01-01
No Photo Available
Sedum pinetorum Pine City sedum Crassulaceae perennial herb Jul None None GUGHQ SH 3 Alpine boulder and rock field (possibly), Subalpine coniferous forest (possibly) Rocky, Slopes, Volcanic 2650 2650 8695 8695 Yes 1974-01-01
No Photo Available
Senecio blochmaniae Blochman's ragwort Asteraceae perennial herb May-Oct None None G3 S3 4.2 SB_CalBG/RSABG Coastal dunes 0 100 0 330 Yes 1974-01-01
No Photo Available
Sibara deserti desert winged-rockcress Brassicaceae annual herb Mar-Apr None None G4 S4 4.3 Mojavean desert scrub 345 1300 1130 4265 1974-01-01
No Photo Available
Sibaropsis hammittii Hammitt's clay-cress Brassicaceae annual herb Mar-Apr None None G2 S2 1B.2 SB_CalBG/RSABG; USFS_S Foot traffic/trampling Chaparral (openings), Valley and foothill grassland Clay 720 1065 2360 3495 Yes 2001-01-01
No Photo Available
Sidalcea malviflora ssp. purpurea purple-stemmed checkerbloom Malvaceae perennial rhizomatous herb May-Jun None None G5T1 S1 1B.2 BLM_S Development, Foot traffic/trampling, Grazing, Non-native plant impacts, Recreational use (non-ORV), Road/trail construction/maint. Broadleafed upland forest, Coastal prairie 15 85 50 280 Yes 2001-01-01
No Photo Available
Silene aperta Tulare campion Caryophyllaceae perennial herb Jul-Aug None None G4 S4 4.3 Lower montane coniferous forest, Subalpine coniferous forest, Upper montane coniferous forest 1800 2995 5905 9825 Yes 1974-01-01
No Photo Available
Silene oregana Oregon campion Caryophyllaceae perennial herb Jul-Sep None None G4 S3 2B.2 Foot traffic/trampling, Grazing, Logging, Recreational use (non-ORV), Road/trail construction/maint. Great Basin scrub, Subalpine coniferous forest 1500 2500 4920 8205 2001-01-01 Photo of Silene oregana
©2019 Matt C. Berger
Sisyrinchium funereum Death Valley blue-eyed grass Iridaceae perennial rhizomatous herb Feb-Apr None None G2 S2 1B.3 SB_CalBG/RSABG Foot traffic/trampling, Grazing, Groundwater pumping, Non-native plant impacts, Surface water diversion Meadows and seeps (alkaline) 40 915 130 3000 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
Spermolepis echinata CBR 2001-01-01
No Photo Available
Sphaeralcea grossulariifolia currant-leaved desert mallow Malvaceae perennial herb May-Oct None None G4G5 S2 2B.3 Other Chenopod scrub, Great Basin scrub Volcanic 1200 2100 3935 6890 2001-01-01
No Photo Available
Sphaeralcea munroana Munro's desert mallow Malvaceae perennial herb May-Jun None None G4 S1 2B.2 Great Basin scrub 2000 2000 6560 6560 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
Stachys pilosa hairy marsh hedge-nettle Lamiaceae perennial rhizomatous herb Jun-Aug None None G5 S3 2B.3 Non-native plant impacts, Other, Road/trail construction/maint. Great Basin scrub (mesic), Meadows and seeps 1200 1770 3935 5805 2001-01-01 Photo of Stachys pilosa
Keir Morse
Stanleya viridiflora green-flowered prince's plume Brassicaceae perennial herb May-Aug None None G4 S2? 2B.3 Other Great Basin scrub (white ash deposits) 1300 1600 4265 5250 2001-01-01
No Photo Available
Stellaria littoralis beach starwort Caryophyllaceae perennial rhizomatous herb Mar-Jul None None G3 S3 4.2 Bogs and fens, Coastal bluff scrub, Coastal dunes, Coastal scrub, Marshes and swamps 5 40 15 130 Yes 2001-01-01
No Photo Available
Stemodia durantifolia purple stemodia Plantaginaceae perennial herb (Jan)Apr-Dec None None G5 S2 2B.1 SB_CRES Foot traffic/trampling, Improper burning regime, Military operations Sonoran desert scrub (often mesic, sandy) 180 300 590 985 2001-01-01
No Photo Available
Streptanthus barbiger bearded jewelflower Brassicaceae annual herb May-Jul None None G3 S3 4.2 SB_UCBG Chaparral (serpentinite) 150 1070 490 3510 Yes 2001-01-01 Photo of Streptanthus barbiger
© 2017 John Doyen
Streptanthus hesperidis green jewelflower Brassicaceae annual herb May-Jul None None G2G3 S2S3 1B.2 BLM_S; SB_CalBG/RSABG Chaparral (openings), Cismontane woodland Rocky, Serpentine 130 760 425 2495 Yes 2001-01-01
No Photo Available
Sphaerocarpos drewiae bottle liverwort Sphaerocarpaceae ephemeral liverwort None None G1 S1 1B.1 IUCN_EN Development, Road/trail construction/maint. Chaparral, Coastal scrub Openings 90 600 295 1970 Yes 2001-01-01
No Photo Available
Scopelophila cataractae tongue-leaf copper moss Pottiaceae moss None None G3G4 S1 2B.2 Cismontane woodland (metamorphic, soil) 400 400 1310 1310 2001-01-01
No Photo Available
Sphagnum strictum CBR 2001-01-01
No Photo Available
Symphyotrichum defoliatum San Bernardino aster Asteraceae perennial rhizomatous herb Jul-Nov None None G2 S2 1B.2 SB_CalBG/RSABG; SB_CRES; USFS_S Agriculture, Development, Erosion/runoff, Foot traffic/trampling, Grazing, Mining, Non-native plant impacts, ORV activity, Other, Road/trail construction/maint., Wood cutting or brush clearing Cismontane woodland, Coastal scrub, Lower montane coniferous forest, Marshes and swamps, Meadows and seeps, Valley and foothill grassland (vernally mesic) Streambanks 2 2040 5 6695 Yes 2004-01-01
No Photo Available
Silene serpentinicola serpentine catchfly Caryophyllaceae perennial rhizomatous herb May-Jul None None G3 S3 1B.2 SB_UCSC; USFS_S Foot traffic/trampling, Improper burning regime, Logging, Non-native plant impacts, ORV activity, Other, Road/trail construction/maint. Chaparral, Lower montane coniferous forest Gravelly (sometimes), Openings, Rocky (sometimes), Serpentine 145 1650 475 5415 2005-01-01 Photo of Silene serpentinicola
©2008 Norman Jensen
Saltugilia australis CBR 2006-01-10
No Photo Available
Salvia clevelandii CBR 2006-01-10
No Photo Available
Salvia columbariae var. ziegleri CBR 2006-01-10
No Photo Available
Salvia vaseyi CBR 2006-01-10
No Photo Available
Saxifraga fragarioides CBR 2006-01-10
No Photo Available
Scopulophila rixfordii CBR 2006-01-10
No Photo Available
Sedum spathulifolium ssp. purdyi CBR 2006-01-10
No Photo Available
Senecio clarkianus CBR 2006-01-10
No Photo Available
Senecio lyonii CBR 2006-01-10
No Photo Available
Sibara rosulata CBR 2006-01-10
No Photo Available
Sidalcea ranunculacea CBR 2006-01-10
No Photo Available
Sisyrinchium halophilum CBR 2006-01-10
No Photo Available
Stipa latiglumis CBR 2006-01-10
No Photo Available
Stipa scribneri CBR 2006-01-10
No Photo Available
Stipa stillmanii CBR 2006-01-10
No Photo Available
Streptanthus barbatus CBR 2006-01-10
No Photo Available
Stylocline micropoides CBR 2006-01-10
No Photo Available
Stylomecon heterophylla CBR 2006-01-10
No Photo Available
Sedum purdyi CBR 2006-01-10
No Photo Available
Schoenolirion bracteosum CBR 2006-01-10
No Photo Available
Streptanthus tortuosus var. suffrutescens CBR 2006-01-10
No Photo Available
Solidago missouriensis CBR 2006-01-10
No Photo Available
Sidalcea setosa ssp. setosa CBR 2006-01-10
No Photo Available
Sidalcea malvaeflora ssp. elegans CBR 2006-01-10
No Photo Available
Silene hookeri ssp. pulverulenta CBR 2006-01-10
No Photo Available
Salix parksiana CBR 2006-01-10
No Photo Available
Salix tracyi CBR 2006-01-10
No Photo Available
Solanum xanti var. hoffmannii CBR 2006-01-10
No Photo Available
Solanum xanti var. obispoense CBR 2006-01-10
No Photo Available
Sedum radiatum ssp. depauperatum CBR 2006-01-10
No Photo Available
Sequoiadendron giganteum CBR 2006-01-10
No Photo Available
Stipa lettermanii CBR 2006-01-10
No Photo Available
Saxifraga integrifolia var. integrifolia CBR 2006-01-10
No Photo Available
Stachys pycnantha CBR 2006-01-10
No Photo Available
Sagittaria rigida CBR 2006-01-10
No Photo Available
Stachys bergii CBR 2006-01-10
No Photo Available
Stachys cooleyae CBR 2006-01-10
No Photo Available
Stachys stebbinsii CBR 2006-01-10
No Photo Available
Solanum tenuilobatum CBR 2006-01-10
No Photo Available
Saltugilia splendens ssp. grantii CBR 2006-01-10
No Photo Available
Salicornia bigelovii CBR 2006-01-10
No Photo Available
Salix planifolia ssp. planifolia CBR 2006-01-10
No Photo Available
Shepherdia argentea CBR 2006-01-10
No Photo Available
Stanleya pinnata var. inyoensis CBR 2006-01-10
No Photo Available
Stephanomeria paniculata CBR 2006-01-10
No Photo Available
Stylocline intertexta CBR 2006-01-10
No Photo Available
Synthyris reniformis var. cordata CBR 2006-01-10
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
Silene invisa CBR 2006-01-10
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
Shepherdia canadensis Canadian buffalo-berry Elaeagnaceae perennial shrub Apr-Jul None None G5 S1 2B.1 Logging Upper montane coniferous forest Rocky, Serpentine, Streambanks 1731 1731 5680 5680 2006-10-13 Photo of Shepherdia canadensis
©2011 Jean Pawek
Silene salmonacea Klamath Mountain catchfly Caryophyllaceae perennial herb (Apr)May-Jul None None G3 S3 1B.2 SB_UCSC; USFS_S Erosion/runoff, Logging, Mining, ORV activity, Recreational use (non-ORV), Road/trail construction/maint., Wood cutting or brush clearing Lower montane coniferous forest Openings, Serpentine (usually) 775 1345 2545 4415 Yes 2006-10-31 Photo of Silene salmonacea
©2008 Amanda Shufelberger
Senecio astephanus San Gabriel ragwort Asteraceae perennial herb May-Jul None None G3 S3 4.3 SB_CalBG/RSABG Chaparral, Coastal scrub Rocky, Slopes 400 1500 1310 4920 Yes 2006-12-21
No Photo Available
Streptanthus longisiliquus long-fruit jewelflower Brassicaceae perennial herb Apr-Sep None None G3 S3 4.3 Cismontane woodland, Lower montane coniferous forest Openings 715 1500 2345 4920 Yes 2007-08-31 Photo of Streptanthus longisiliquus
©2008 Sierra Pacific Industries
Sisyrinchium longipes timberland blue-eyed grass Iridaceae perennial herb Jun-Aug None None G3 S1 2B.2 SB_CalBG/RSABG; USFS_S ORV activity Meadows and seeps Mesic 2060 2060 6760 6760 2008-03-20
No Photo Available
Sidalcea multifida cut-leaf checkerbloom Malvaceae perennial herb May-Sep None None G3 S2 2B.3 SB_CalBG/RSABG Dam/Inundation, Development, Foot traffic/trampling, Grazing, ORV activity, Other, Recreational use (non-ORV) Great Basin scrub, Lower montane coniferous forest, Meadows and seeps, Pinyon and juniper woodland 1750 2800 5740 9185 2009-01-06
No Photo Available
Streptanthus vernalis early jewelflower Brassicaceae annual herb Mar-May None None G1 S1 1B.2 BLM_S; SB_UCBG ORV activity Chaparral, Closed-cone coniferous forest Serpentine 610 610 2000 2000 Yes 2009-02-04
No Photo Available
Sidalcea hickmanii ssp. pillsburiensis Lake Pillsbury checkerbloom Malvaceae perennial herb Jul-Aug None None G2T1 S1 1B.2 USFS_S Other Chaparral Openings 700 700 2295 2295 Yes 2009-02-04
No Photo Available
Sidalcea hickmanii ssp. napensis Napa checkerbloom Malvaceae perennial herb Apr-Jun None None G2T1 S1 1B.1 SB_CalBG/RSABG Agriculture Chaparral 415 610 1360 2000 Yes 2009-04-02
No Photo Available
Streptanthus oblanceolatus Trinity River jewelflower Brassicaceae perennial herb Apr-Jun None None G1 S1 1B.2 SB_UCSC; USFS_S Cismontane woodland Gravelly, Roadsides, Rock crevices, Rocky, Volcanic 20 420 65 1380 Yes 2010-01-04 Photo of Streptanthus oblanceolatus
©2009 Dana York
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
Sabulina stricta bog sandwort Caryophyllaceae perennial herb Jul-Sep None None G5 S3 2B.3 Alpine boulder and rock field, Alpine dwarf scrub, Meadows and seeps 2440 3960 8005 12995 2010-04-06
No Photo Available
Sarcobatus baileyi Bailey's greasewood Sarcobataceae perennial deciduous shrub Apr-Jul None None G4 S1 2B.3 Grazing, Improper burning regime, ORV activity, Road/trail construction/maint. Chenopod scrub Alkaline, Roadsides, Washes 1500 1600 4920 5250 2011-08-09
No Photo Available
Scirpus cyperinus CBR 2012-01-26
No Photo Available
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
Sidalcea elegans Del Norte checkerbloom Malvaceae perennial rhizomatous herb May-Jul None None G4? S2? 3.3 Chaparral, Lower montane coniferous forest Serpentine 215 1365 705 4480 2012-07-23
No Photo Available
Sidalcea gigantea giant checkerbloom Malvaceae perennial rhizomatous herb (Jan-Jun)Jul-Oct None None G3 S3 4.3 Lower montane coniferous forest, Upper montane coniferous forest Seeps 670 1950 2200 6400 Yes 2012-07-10 Photo of Sidalcea gigantea
©2018 Sierra Pacific Industries
Sidalcea malviflora ssp. dolosa Bear Valley checkerbloom Malvaceae perennial herb May-Aug None None G5T2 S2 1B.2 SB_CalBG/RSABG; USFS_S Lower montane coniferous forest (meadows, seeps), Meadows and seeps, Riparian woodland, Upper montane coniferous forest (meadows, seeps) 1495 2685 4905 8810 Yes 2012-06-13
No Photo Available
Sulcaria spiralifera twisted horsehair lichen Parmeliaceae fruticose lichen (epiphytic) None None G3G4 S2 1B.2 BLM_S Development, Improper burning regime, Non-native plant impacts, ORV activity Coastal dunes (SLO Co.), North Coast coniferous forest (immediate coast) 0 90 0 295 2014-03-01 Photo of Sulcaria spiralifera
© 2021 Scot Loring
Solorina spongiosa fringed chocolate chip lichen Peltigeraceae crustose lichen (terricolous) None None G4G5 S1 2B.2 Foot traffic/trampling, Grazing, Recreational use (non-ORV) Meadows and seeps, Subalpine coniferous forest (seeps) Carbonate 2895 2895 9500 9500 2014-03-01 Photo of Solorina spongiosa
© 2014 Martin Hutten
Sulcaria isidiifera splitting yarn lichen Alectoriaceae fruticose lichen (epiphytic) None None G1 S1 1B.1 Development, Improper burning regime, Other, Over-collecting/poaching Coastal scrub (old growth) 20 30 65 100 Yes 2014-03-01
No Photo Available
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
Sedum citrinum Blue Creek stonecrop Crassulaceae perennial herb Jun None None G2 S2 1B.2 SB_UCSC Mining, Road/trail construction/maint. North Coast coniferous forest Roadsides (sometimes), Rock crevices, Rocky, Scree, Serpentine, Talus 1050 1280 3445 4200 Yes 2015-04-20 Photo of Sedum citrinum
©2014 Peter Zika
Spermolepis infernensis Hellhole scaleseed Apiaceae annual herb Mar-Apr None None G1 S1 1B.2 SB_CalBG/RSABG Sonoran desert scrub Rocky (sometimes), Sandy (sometimes) 230 670 755 2200 Yes 2016-01-21
No Photo Available
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
Streptanthus tortuosus ssp. truei True's mountain jewelflower Brassicaceae perennial herb Jun-Jul(Sep) None None G5T1T2 S1S2 1B.1 Road/trail construction/maint. Lower montane coniferous forest Rocky, Slopes 765 860 2510 2820 Yes 2016-07-20 Photo of Streptanthus tortuosus ssp. truei
© 2021 Robert E. Preston, Ph.D
Stipa viridula CBR 2016-11-03
No Photo Available
Symphyotrichum spathulatum var. yosemitanum CBR 2017-02-14
No Photo Available
Spergularia macrotheca var. longistyla long-styled sand-spurrey Caryophyllaceae perennial herb Feb-May None None G5T2 S2 1B.2 Development, Non-native plant impacts Marshes and swamps, Meadows and seeps Alkaline 0 255 0 835 Yes 2017-06-16
No Photo Available
Silene krantzii Krantz's catchfly Caryophyllaceae perennial herb Apr-Sep None None G1 S1 1B.2 SB_CalBG/RSABG Alpine dwarf scrub Gravelly (usually), Rocky (sometimes), Sandy (usually) 3235 3510 10615 11515 Yes 2017-07-19
No Photo Available
Silene scouleri ssp. scouleri Scouler's catchfly Caryophyllaceae perennial herb (Mar-May)Jun-Aug(Sep) None None G5T4T5 S2S3 2B.2 Grazing, Non-native plant impacts, Other, Road/trail construction/maint. Coastal bluff scrub, Coastal prairie, Valley and foothill grassland 0 600 0 1970 2017-12-13 Photo of Silene scouleri ssp. scouleri
©2015 Vernon Smith
Streptanthus anomalus Mount Burdell jewelflower Brassicaceae annual herb May-Jun None None G1 S1 1B.1 SB_CalBG/RSABG Foot traffic/trampling, Grazing Cismontane woodland (openings) Openings, Serpentine 50 150 165 490 Yes 2019-08-21 Photo of Streptanthus anomalus
© 2015 Aaron Schusteff
Sphenopholis interrupta ssp. californica prairie false oat Poaceae annual herb Apr None None G4T1 S1 1B.1 Agriculture, Insufficient population/stand size, Non-native plant impacts, Other Chaparral (coastal) Clay 15 15 50 50 2020-09-03
No Photo Available
Streptanthus juneae June's jewelflower Brassicaceae perennial herb Jun-Aug None None G2 S2 1B.2 SB_CalBG/RSABG Other, Recreational use (non-ORV), Road/trail construction/maint. Chaparral (montane), Lower montane coniferous forest Openings 2155 2370 7070 7775 Yes 2020-12-09
No Photo Available
Streptanthus insignis ssp. insignis plumed jewelflower Brassicaceae annual herb Mar-May None None G3G4T3T4 S3S4 4.3 Chaparral Openings, Rocky, Serpentine (often), Shale, Talus 300 1100 985 3610 Yes 2021-02-03
No Photo Available
Streptanthus medeirosii Tejon jewelflower Brassicaceae perennial herb Jun-Sep None None G1 S1 1B.1 Development, Road/trail construction/maint. Cismontane woodland Carbonate, Granitic 1360 1880 4460 6170 Yes 2020-11-05 Photo of Streptanthus medeirosii
©2019 Neal Kramer
Sulcaria badia grooved beard lichen Parmeliaceae fruticose lichen (epiphytic) None None G3 S3 4.2 Cismontane woodland, Lower montane coniferous forest 415 1510 1360 4955 2021-03-19 Photo of Sulcaria badia
© 2013 Scot Loring
Sedum sanhedrinum Sanhedrin Mountain stonecrop Crassulaceae perennial herb May-Jul None None G2G3 S2S3 1B.2 Chaparral, Lower montane coniferous forest, Upper montane coniferous forest Gabbroic, Metamorphic, Openings, Rock crevices, Rocky, Serpentine, Talus 1415 2285 4645 7495 2021-05-14 Photo of Sedum sanhedrinum
© 2014 Carex Working Group
Sedum rubiginosum Tedoc Mountain stonecrop Crassulaceae perennial herb Jun-Jul None None G1 S1 1B.2 Over-collecting/poaching Lower montane coniferous forest, Upper montane coniferous forest Openings, Rocky, Serpentine, Talus 1350 1500 4430 4920 2021-05-14 Photo of Sedum rubiginosum
© 2019 Steve Matson
Sedum patens Smith River stonecrop Crassulaceae perennial herb May-Jul None None G2 S2 1B.2 Lower montane coniferous forest Openings, Rock crevices, Rocky, Talus 90 210 295 690 2021-05-14
No Photo Available
Sedum marmorense Marble Mountains stonecrop Crassulaceae perennial herb Jul-Aug None None G1G2 S1S2 1B.2 Improper burning regime, Over-collecting/poaching Subalpine coniferous forest, Upper montane coniferous forest Openings, Rock crevices, Rocky, Talus 1875 2345 6150 7695 2021-05-14 Photo of Sedum marmorense
©2016 Dana York
Silene nelsonii Nelson's stringflower Caryophyllaceae perennial herb Apr-Jun None None G3 S3 4.3 Cismontane woodland, Lower montane coniferous forest Openings, Roadsides, Rocky 290 1430 950 4690 Yes 2021-06-24 Photo of Silene nelsonii
©2019 Steve Matson
Silene hookeri Hooker's catchfly Caryophyllaceae perennial herb (Mar)May-Jul None None G4 S2 2B.2 Other, Wood cutting or brush clearing Chaparral, Cismontane woodland, Lower montane coniferous forest Openings (often), Rocky (sometimes), Serpentine (sometimes), Slopes (sometimes) 150 1260 490 4135 2021-07-30 Photo of Silene hookeri
©2014 John Doyen
Silene bolanderi Bolander's catchfly Caryophyllaceae perennial herb May-Jun None None G2 S2 1B.2 Chaparral (edges), Cismontane woodland, Lower montane coniferous forest, Meadows and seeps, North Coast coniferous forest Openings (usually), Roadsides (sometimes), Rocky (sometimes), Serpentine (sometimes) 420 1150 1380 3775 2021-07-30
No Photo Available
Scytinium siskiyouense Siskiyou jellyskin lichen Collemataceae foliose lichen None None G2G3 S1S2 1B.1 Improper burning regime Lower montane coniferous forest, North Coast coniferous forest 635 1460 2085 4790 2022-10-13
No Photo Available
Scytinium teretiusculum shrubby vinyl CBR 2022-10-12
No Photo Available
Syntrichia lithophila Dusén's twisted moss Pottiaceae moss (saxicolous) None None G4 S1 2B.3 Great Basin scrub, Pinyon and juniper woodland 1280 1280 4200 4200 2023-08-25
No Photo Available
Stuckenia striata broadleaf pondweed Potamogetonaceae perennial rhizomatous (aquatic) (Jun)Jul-Aug None None G3G4Q S2S3 2B.3 Marshes and swamps -70 2135 -230 7005 2024-01-30
No Photo Available
Sedum oregonense CBR 2024-02-29
No Photo Available
Stanleya elata CBR 2024-02-29
No Photo Available
Stephanomeria pauciflora var. parishii CBR 2024-02-29
No Photo Available
Streptanthus tortuosus var. flavescens CBR 2024-02-29
No Photo Available
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 25 April 2024].