CNPS

CNPS Rare Plant Inventory


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115 matches found. Click on scientific name for details

Search Criteria: Common Name starts with T

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
Calochortus tiburonensis Tiburon mariposa-lily Liliaceae perennial bulbiferous herb Mar-Jun FT CT G1 S1 1B.1 SB_UCBG Foot traffic/trampling, Non-native plant impacts Valley and foothill grassland (serpentinite) 50 150 165 490 Yes 1974-01-01
No Photo Available
Allium tribracteatum three-bracted onion Alliaceae perennial bulbiferous herb Apr-Aug None None G2 S2 1B.2 SB_SBBG; USFS_S Development, Foot traffic/trampling, Grazing, Logging, Non-native plant impacts, ORV activity, Other, Recreational use (non-ORV), Road/trail construction/maint., Vandalism/dumping/litter, Wood cutting or brush clearing Chaparral, Lower montane coniferous forest, Upper montane coniferous forest Volcanic 1100 3000 3610 9845 Yes 1988-01-01 Photo of Allium tribracteatum
© 2018 Sierra Pacific Industries
Arctostaphylos montereyensis Toro manzanita Ericaceae perennial evergreen shrub Feb-Mar None None G2? S2? 1B.2 BLM_S; SB_SBBG Development, Non-native plant impacts Chaparral (maritime), Cismontane woodland, Coastal scrub Sandy 30 730 100 2395 Yes 1974-01-01 Photo of Arctostaphylos montereyensis
© 2018 Susan McDougall
Arctostaphylos mewukka ssp. truei True's manzanita Ericaceae perennial evergreen shrub Feb-Jul None None G4?T3 S3 4.2 SB_UCSC Chaparral, Lower montane coniferous forest Roadsides (sometimes) 425 1390 1395 4560 Yes 1984-01-01 Photo of Arctostaphylos mewukka ssp. truei
© 2008 George W. Hartwell
Collomia larsenii talus collomia Polemoniaceae perennial rhizomatous herb Jul-Sep(Oct) None None G4 S2 2B.2 USFS_S Foot traffic/trampling, Road/trail construction/maint. Alpine boulder and rock field, Closed-cone coniferous forest, Subalpine coniferous forest, Upper montane coniferous forest Talus, Volcanic 2210 3500 7250 11485 1980-01-01 Photo of Collomia larsenii
© 2009 Leigh Johnson
Collomia tracyi Tracy's collomia Polemoniaceae annual herb Jun-Jul None None G4 S4 4.3 Broadleafed upland forest, Lower montane coniferous forest Rocky, Serpentine (sometimes) 300 2100 985 6890 Yes 1974-01-01 Photo of Collomia tracyi
©2018 Julie Kierstead Nelson
Antirrhinum virga twig-like snapdragon Plantaginaceae perennial herb Jun-Jul None None G3? S3? 4.3 Chaparral, Lower montane coniferous forest Openings, Rocky, Serpentine (often) 100 2015 330 6610 Yes 1974-01-01 Photo of Antirrhinum virga
© 2013 Aaron Schusteff
Deinandra floribunda Tecate tarplant Asteraceae annual herb Aug-Oct None None G2 S2 1B.2 BLM_S; SB_CalBG/RSABG; SB_CRES; SB_USDA; USFS_S Development, Grazing, Road/trail construction/maint. Chaparral, Coastal scrub 70 1220 230 4005 1974-01-01
No Photo Available
Carex tompkinsii Tompkins' sedge Cyperaceae perennial rhizomatous herb May-Jul None CR G3G4 S3S4 4.3 Biocides, Development, Erosion/runoff, Foot traffic/trampling, Road/trail construction/maint. Chaparral, Cismontane woodland, Lower montane coniferous forest, Upper montane coniferous forest Granitic (sometimes) 420 1830 1380 6005 Yes 1980-01-01
No Photo Available
Carpenteria californica tree-anemone Hydrangeaceae perennial evergreen shrub (Apr)May-Jul None CT G1? S1? 1B.2 SB_CalBG/RSABG; SB_UCBG; USFS_S Dam/Inundation, Development, Grazing, Improper burning regime, Logging, ORV activity, Other, Road/trail construction/maint., Vandalism/dumping/litter Chaparral, Cismontane woodland Granitic (usually) 340 1340 1115 4395 Yes 1974-01-01
No Photo Available
Boechera pygmaea Tulare County rockcress Brassicaceae perennial herb Jun-Jul None None G3 S3 4.3 Meadows and seeps (edges), Subalpine coniferous forest Granitic (sometimes), Gravelly (sometimes), Sandy (sometimes), Volcanic (sometimes) 2315 3400 7595 11155 Yes 1974-01-01
No Photo Available
Arabis rigidissima var. rigidissima Trinity Mountains rockcress Brassicaceae perennial herb Jun-Aug None None G3T3 S3 1B.3 Upper montane coniferous forest (gravelly, rocky) 1190 2200 3905 7220 Yes 1974-01-01 Photo of Arabis rigidissima var. rigidissima
©2015 Dana York
Boechera tiehmii Tiehm's rockcress Brassicaceae perennial herb Jul-Aug None None G3 S3 1B.3 SB_CalBG/RSABG; USFS_S Road/trail construction/maint. Alpine boulder and rock field (granitic) 2970 3590 9745 11780 1988-01-01
No Photo Available
Delphinium variegatum ssp. thornei Thorne's royal larkspur Ranunculaceae perennial herb (Mar)Apr-May None None G4T1 S1 1B.1 SB_CalBG/RSABG Erosion/runoff Cismontane woodland, Valley and foothill grassland (coastal) 250 575 820 1885 Yes 1974-01-01
No Photo Available
Eriogonum polypodum Tulare County buckwheat Polygonaceae perennial herb Jul-Aug None None G4 S4 4.3 SB_CalBG/RSABG Subalpine coniferous forest (granitic, sandy or gravelly) 2400 3500 7875 11485 Yes 1974-01-01
No Photo Available
Astragalus pseudiodanthus Tonopah milk-vetch Fabaceae perennial herb May-Jun None None G2Q S2 1B.2 BLM_S; SB_CalBG/RSABG; SB_SBBG Grazing, Road/trail construction/maint. Great Basin scrub (stabilized dunes) 2025 2075 6645 6810 1980-01-01
No Photo Available
Astragalus traskiae Trask's milk-vetch Fabaceae perennial herb Feb-Jul None CR G3 S3 1B.2 Erosion/runoff, Non-native plant impacts Coastal bluff scrub, Coastal dunes, Coastal scrub 5 245 15 805 Yes 1974-01-01
No Photo Available
Astragalus tricarinatus triple-ribbed milk-vetch Fabaceae perennial herb Feb-May FE None G2 S2 1B.2 SB_CalBG/RSABG Foot traffic/trampling, Grazing, ORV activity, Road/trail construction/maint. Joshua tree "woodland", Sonoran desert scrub Gravelly (sometimes), Sandy (sometimes) 450 1190 1475 3905 Yes 1974-01-01
No Photo Available
Bouteloua trifida three-awned grama Poaceae perennial herb (Apr)May-Sep None None G4G5 S3 2B.3 SB_CalBG/RSABG Mining, ORV activity Mojavean desert scrub (carbonate, rocky) 700 2000 2295 6560 1974-01-01
No Photo Available
Brodiaea filifolia thread-leaved brodiaea Themidaceae perennial bulbiferous herb Mar-Jun FT CE G2 S2 1B.1 SB_CalBG/RSABG; SB_CRES Agriculture, Altered flood/tidal/hydrologic regime, Dam/Inundation, Development, Disking, Erosion/runoff, Foot traffic/trampling, Grazing, Hybridization, Improper burning regime, Landfill, Military operations, Non-native plant impacts, ORV activity, Other, Recreational use (non-ORV), Road/trail construction/maint., Surface water diversion, Vandalism/dumping/litter, Waterway bank protection/maintenance, Wood cutting or brush clearing Chaparral (openings), Cismontane woodland, Coastal scrub, Playas, Valley and foothill grassland, Vernal pools Clay (often) 25 1120 80 3675 Yes 1974-01-01 Photo of Brodiaea filifolia
© 2016 Keir Morse
Calamagrostis crassiglumis Thurber's reed grass Poaceae perennial rhizomatous herb May-Aug None None G3Q S2 2B.1 Foot traffic/trampling, Grazing, Non-native plant impacts, Road/trail construction/maint. Coastal scrub (mesic), Marshes and swamps (freshwater) 10 60 35 195 1980-01-01
No Photo Available
Hesperolinon bicarpellatum two-carpellate western flax Linaceae annual herb (Apr)May-Jul None None G2 S2 1B.2 BLM_S; SB_UCSC Development, Erosion/runoff, Grazing, Other, Road/trail construction/maint. Chaparral (serpentinite) 60 1005 195 3295 Yes 1974-01-01 Photo of Hesperolinon bicarpellatum
© 2016 John Doyen
Castilleja affinis var. neglecta Tiburon paintbrush Orobanchaceae perennial herb (hemiparasitic) Apr-Jun FE CT G4G5T1T2 S1S2 1B.2 SB_CalBG/RSABG; SB_UCBG Development, Feral pigs, Foot traffic/trampling, Grazing, Landfill, Mining, Non-native plant impacts, ORV activity, Other Valley and foothill grassland (serpentinite) 60 400 195 1310 Yes 1974-01-01
No Photo Available
Chloropyron tecopense Tecopa bird's-beak Orobanchaceae annual herb (hemiparasitic) Jul-Oct None None G2 S1 1B.2 BLM_S; SB_CalBG/RSABG Altered flood/tidal/hydrologic regime, Development, Foot traffic/trampling, Groundwater pumping, Mining, Non-native plant impacts, ORV activity, Other, Vandalism/dumping/litter, Waterway bank protection/maintenance Meadows and seeps, Mojavean desert scrub Alkaline, Mesic 60 900 195 2955 1974-01-01
No Photo Available
Cryptantha traskiae Trask's cryptantha Boraginaceae annual herb Mar-Jun None None G2 S2 1B.1 SB_CalBG/RSABG Non-native plant impacts Coastal bluff scrub, Coastal dunes, Coastal scrub 15 400 50 1310 Yes 1974-01-01
No Photo Available
Hesperocyparis forbesii Tecate cypress Cupressaceae perennial evergreen tree None None G2 S2 1B.1 BLM_S; SB_CalBG/RSABG; SB_CRES; SB_UCSC; SB_USDA; USFS_S Development, Foot traffic/trampling, Grazing, Improper burning regime, Landfill, Mining, Non-native plant impacts, Other, Recreational use (non-ORV), Road/trail construction/maint. Chaparral, Closed-cone coniferous forest Clay, Gabbroic (sometimes) 80 1500 260 4920 1974-01-01 Photo of Hesperocyparis forbesii
© 2011 Joey Malone
Draba asterophora var. asterophora Tahoe draba Brassicaceae perennial herb Jul-Aug(Sep) None None G2T2? S2? 1B.2 USFS_S Development, Erosion/runoff, Foot traffic/trampling, ORV activity, Other, Pollution, Recreational use (non-ORV), Road/trail construction/maint. Alpine boulder and rock field, Subalpine coniferous forest 2500 3505 8205 11500 1974-01-01
No Photo Available
Eriogonum alpinum Trinity buckwheat Polygonaceae perennial rhizomatous herb Jun-Sep None CE G2 S2 1B.2 USFS_S Development, Erosion/runoff, Foot traffic/trampling, Grazing, Mining, ORV activity Alpine boulder and rock field, Subalpine coniferous forest, Upper montane coniferous forest Rocky, Serpentine 1675 2900 5495 9515 Yes 1974-01-01 Photo of Eriogonum alpinum
Eric White 2010
Iris hartwegii ssp. columbiana Tuolumne iris Iridaceae perennial rhizomatous herb May-Jun None None G4T1 S1 1B.2 BLM_S; USFS_S ORV activity, Road/trail construction/maint. Cismontane woodland, Lower montane coniferous forest 425 1400 1395 4595 Yes 1980-01-01
No Photo Available
Muhlenbergia arsenei tough muhly Poaceae perennial rhizomatous herb Aug-Oct None None G5 S2? 2B.3 Development, Logging, Mining, ORV activity Pinyon and juniper woodland (carbonate, rocky) 1400 1860 4595 6105 1974-01-01
No Photo Available
Poa rhizomata timber bluegrass Poaceae perennial rhizomatous herb Apr-Jul None None G3G4 S3S4 1B.3 Lower montane coniferous forest, Subalpine coniferous forest, Upper montane coniferous forest Mesic, Serpentine (sometimes) 520 2040 1705 6695 1974-01-01
No Photo Available
Phacelia exilis Transverse Range phacelia Hydrophyllaceae annual herb May-Aug None None G4Q S4 4.3 SB_CalBG/RSABG; SB_SBBG Lower montane coniferous forest, Meadows and seeps, Pebble (Pavement) plain, Upper montane coniferous forest Gravelly (sometimes), Sandy (sometimes) 1100 2700 3610 8860 Yes 1994-01-01
No Photo Available
Eriogonum luteolum var. caninum Tiburon buckwheat Polygonaceae annual herb May-Sep None None G5T2 S2 1B.2 SB_CalBG/RSABG Development, Erosion/runoff, Foot traffic/trampling, Grazing, Non-native plant impacts, Road/trail construction/maint. Chaparral, Cismontane woodland, Coastal prairie, Valley and foothill grassland Gravelly, Sandy, Serpentine 0 700 0 2295 Yes 1974-01-01
No Photo Available
Eriogonum thornei Thorne's buckwheat Polygonaceae perennial shrub (Jun)Jul-Aug None CE G1 S1 1B.2 SB_CalBG/RSABG Improper burning regime, Mining, Road/trail construction/maint. Pinyon and juniper woodland (gravelly) 1800 1830 5905 6005 Yes 1974-01-01
No Photo Available
Eriogonum temblorense Temblor buckwheat Polygonaceae annual herb (Apr)May-Sep None None G2 S2 1B.2 BLM_S Erosion/runoff, Foot traffic/trampling, Grazing, Non-native plant impacts Valley and foothill grassland (clay, sandstone) 300 1000 985 3280 Yes 1974-01-01
No Photo Available
Eriogonum ternatum ternate buckwheat Polygonaceae perennial herb Jun-Aug None None G4 S4 4.3 Lower montane coniferous forest (serpentinite) 305 2225 1000 7300 1974-01-01 Photo of Eriogonum ternatum
©2017 Dana York
Eriogonum twisselmannii Twisselmann's buckwheat Polygonaceae perennial herb Jun-Sep None CR G2 S2 1B.2 USFS_S Foot traffic/trampling, Logging, Other Upper montane coniferous forest (granitic) 2375 2805 7790 9205 Yes 1974-01-01
No Photo Available
Eryngium pinnatisectum Tuolumne button-celery Apiaceae annual/perennial herb May-Aug None None G2 S2 1B.2 SB_UCSC Altered flood/tidal/hydrologic regime, Development, Grazing, Non-native plant impacts, Road/trail construction/maint. Cismontane woodland, Lower montane coniferous forest, Vernal pools Mesic 70 915 230 3000 Yes 1974-01-01 Photo of Eryngium pinnatisectum
© 2007 Robert E. Preston, Ph.D.
Erythronium tuolumnense Tuolumne fawn lily Liliaceae perennial bulbiferous herb Mar-Jun None None G2G3 S2S3 1B.2 BLM_S; SB_CalBG/RSABG; USFS_S Agriculture, Biocides, Erosion/runoff, Foot traffic/trampling, Grazing, Logging, Mining, Non-native plant impacts, ORV activity, Other, Over-collecting/poaching, Recreational use (non-ORV), Road/trail construction/maint., Vandalism/dumping/litter Broadleafed upland forest, Chaparral, Cismontane woodland, Lower montane coniferous forest 510 1365 1675 4480 Yes 1974-01-01
No Photo Available
Fritillaria falcata talus fritillary Liliaceae perennial bulbiferous herb Mar-May None None G2 S2 1B.2 BLM_S; IUCN_EN; SB_CalBG/RSABG; SB_SBBG; USFS_S Feral pigs, ORV activity, Other, Over-collecting/poaching, Road/trail construction/maint. Chaparral, Cismontane woodland, Lower montane coniferous forest Serpentine, Talus (often) 300 1525 985 5005 Yes 1974-01-01 Photo of Fritillaria falcata
© 2013 Aaron Schusteff
Galium hypotrichium ssp. tomentellum Telescope Peak bedstraw Rubiaceae perennial herb Jun-Aug None None G5T1 S1 1B.3 SB_CalBG/RSABG Road/trail construction/maint. Subalpine coniferous forest (talus) 3300 3550 10825 11650 Yes 1984-01-01 Photo of Galium hypotrichium ssp. tomentellum
© 2011 Steve Matson
Tonestus eximius Tahoe tonestus Asteraceae perennial rhizomatous herb Jul-Aug None None G3 S3 4.3 Subalpine coniferous forest (granitic) 2500 3300 8205 10825 1974-01-01
No Photo Available
Hemizonia congesta ssp. tracyi Tracy's tarplant Asteraceae annual herb (Mar-Apr)May-Oct None None G5T4 S4 4.3 Coastal prairie, Lower montane coniferous forest, North Coast coniferous forest Openings, Serpentine (sometimes) 120 1200 395 3935 Yes 1974-01-01 Photo of Hemizonia congesta ssp. tracyi
© 2016 Steve Matson
Horkelia tenuiloba thin-lobed horkelia Rosaceae perennial herb May-Jul(Aug) None None G2 S2 1B.2 SB_CalBG/RSABG Agriculture, Biocides, Development, Disking, Foot traffic/trampling, Grazing, Non-native plant impacts, Recreational use (non-ORV), Road/trail construction/maint. Broadleafed upland forest, Chaparral, Valley and foothill grassland Mesic, Openings, Sandy 50 500 165 1640 Yes 1988-01-01 Photo of Horkelia tenuiloba
© 1994 Doreen L. Smith
Ivesia callida Tahquitz ivesia Rosaceae perennial herb Jul-Sep None CR G1 S1 1B.3 SB_CalBG/RSABG; USFS_S Road/trail construction/maint. Upper montane coniferous forest (granitic, rocky) 2410 2450 7905 8040 Yes 1974-01-01 Photo of Ivesia callida
2009 Jordan Zylstra
Lathyrus biflorus two-flowered pea Fabaceae perennial herb Jun-Aug None None G1 S1 1B.1 USFS_S Lower montane coniferous forest (serpentinite) 1370 1385 4495 4545 Yes 1984-01-01 Photo of Lathyrus biflorus
© 2005 Jennifer L. Kalt
Lomatium tracyi Tracy's lomatium Apiaceae perennial herb May-Jun None None G4 S4 4.3 Lower montane coniferous forest, Upper montane coniferous forest Serpentine 455 1950 1495 6400 Yes 1974-01-01 Photo of Lomatium tracyi
©2018 Julie Kierstead Nelson
Lupinus tidestromii Tidestrom's lupine Fabaceae perennial rhizomatous herb Apr-Jun FE CE G1 S1 1B.1 SB_CalBG/RSABG Development, Erosion/runoff, Foot traffic/trampling, Grazing, Hybridization, Non-native plant impacts, Other, Recreational use (non-ORV) Coastal dunes 0 100 0 330 Yes 1974-01-01
No Photo Available
Lupinus tracyi Tracy's lupine Fabaceae perennial herb (May)Jun-Jul None None G4 S3 4.3 SB_UCSC Upper montane coniferous forest 895 2000 2935 6560 1974-01-01 Photo of Lupinus tracyi
©2003 Norman Jensen
Monardella linoides ssp. oblonga Tehachapi monardella Lamiaceae perennial rhizomatous herb (May)Jun-Aug None None G5T2 S2 1B.3 BLM_S; SB_CalBG/RSABG; USFS_S Development, Erosion/runoff, Foot traffic/trampling, ORV activity, Recreational use (non-ORV), Road/trail construction/maint., Vandalism/dumping/litter Lower montane coniferous forest, Pinyon and juniper woodland, Upper montane coniferous forest 900 2470 2955 8105 Yes 1974-01-01
No Photo Available
Navarretia heterandra Tehama navarretia Polemoniaceae annual herb Apr-Jun None None G4 S4 4.3 Valley and foothill grassland (mesic), Vernal pools 30 1010 100 3315 1974-01-01 Photo of Navarretia heterandra
©2021 Scot Loring
Nemacladus twisselmannii var. twisselmannii Twisselmann's nemacladus Campanulaceae annual herb Jul None CR G1T1 S1 1B.2 USFS_S Other Upper montane coniferous forest (granitic, sandy or rocky) 2240 2450 7350 8040 Yes 1974-01-01
No Photo Available
Penstemon filiformis thread-leaved beardtongue Plantaginaceae perennial herb May-Aug(Sep) None None G4 S4 4.2 SB_UCSC Development, Erosion/runoff, Grazing, Improper burning regime, Insufficient population/stand size, Logging, Non-native plant impacts, Other, Recreational use (non-ORV), Road/trail construction/maint. Cismontane woodland, Lower montane coniferous forest Rocky, Serpentine (often) 450 1875 1475 6150 Yes 1974-01-01 Photo of Penstemon filiformis
Steve Matson (2015)
Penstemon thurberi Thurber's beardtongue Plantaginaceae perennial herb May-Jul None None G5 S3 4.2 SB_CalBG/RSABG Chaparral, Joshua tree "woodland", Pinyon and juniper woodland, Sonoran desert scrub 500 1220 1640 4005 1988-01-01
No Photo Available
Penstemon tracyi Tracy's beardtongue Plantaginaceae perennial herb Jun-Aug None None G2 S2 1B.3 SB_USDA; USFS_S Other, Recreational use (non-ORV), Road/trail construction/maint. Upper montane coniferous forest (rocky) 1980 2210 6495 7250 Yes 1974-01-01 Photo of Penstemon tracyi
©2005 Dianne Fristrom
Triteleia crocea var. modesta Trinity Mountains triteleia Themidaceae perennial bulbiferous herb May-Jul None None G4T3 S3 4.3 SB_UCSC Lower montane coniferous forest (serpentinite) 1200 2000 3935 6560 Yes 1980-01-01 Photo of Triteleia crocea var. modesta
© 2013 Julie Kierstead Nelson
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
Lessingia micradenia var. micradenia Tamalpais lessingia Asteraceae annual herb (Jun)Jul-Oct None None G2T2 S2 1B.2 SB_CalBG/RSABG; SB_USDA Biocides, Erosion/runoff, Foot traffic/trampling, Road/trail construction/maint. Chaparral, Valley and foothill grassland Roadsides (often), Serpentine (usually) 100 500 330 1640 Yes 1994-01-01 Photo of Lessingia micradenia var. micradenia
© 2015 Vernon Smith
Tiarella trifoliata var. trifoliata trifoliate laceflower Saxifragaceae perennial rhizomatous herb (May)Jun-Aug None None G5T5 S2S3 3.2 Lower montane coniferous forest, North Coast coniferous forest Edges, Streambanks 170 1500 560 4920 1980-01-01 Photo of Tiarella trifoliata var. trifoliata
© 2021 Scot Loring
Eriophyllum confertiflorum var. tanacetiflorum tansy-flowered woolly sunflower Asteraceae perennial shrub May-Jul None None G5T2?Q S2? 4.3 SB_CalBG/RSABG Cismontane woodland, Lower montane coniferous forest 305 1340 1000 4395 Yes 2001-01-01
No Photo Available
Quercus parvula var. tamalpaisensis Tamalpais oak Fagaceae perennial evergreen shrub Mar-Apr None None G4T2 S2 1B.3 Foot traffic/trampling, Improper burning regime, Other, Road/trail construction/maint., Wood cutting or brush clearing Lower montane coniferous forest 100 750 330 2460 Yes 2001-01-01
No Photo Available
Romanzoffia tracyi Tracy's romanzoffia Hydrophyllaceae perennial herb Mar-May None None G4 S2 2B.3 Coastal bluff scrub, Coastal scrub Rocky 15 30 50 100 2001-01-01 Photo of Romanzoffia tracyi
©2017 Steve Matson
Pilostyles thurberi Thurber's pilostyles Apodanthaceae perennial herb (parasitic) Dec-Apr None None G5 S4 4.3 Military operations Sonoran desert scrub 0 365 0 1200 1974-01-01
No Photo Available
Pinus edulis two-needle pinyon pine Pinaceae perennial evergreen tree None None G5 S3 3.3 IUCN_LC Lower montane coniferous forest, Pinyon and juniper woodland 1300 2700 4265 8860 1974-01-01
No Photo Available
Pinus torreyana ssp. torreyana Torrey pine Pinaceae perennial evergreen tree None None G1T1 S1 1B.2 IUCN_CR; SB_CalBG/RSABG; SB_CRES Development, Disease, Erosion/runoff, Non-native plant impacts, Other, Road/trail construction/maint. Chaparral, Closed-cone coniferous forest Sandstone 30 160 100 525 Yes 1974-01-01
No Photo Available
Ribes laxiflorum trailing black currant Grossulariaceae perennial deciduous shrub Mar-Jul(Aug) None None G5? S3 4.3 North Coast coniferous forest Roadsides (sometimes) 5 1395 15 4575 1974-01-01 Photo of Ribes laxiflorum
©2010 Dana York
Rorippa subumbellata Tahoe yellow cress Brassicaceae perennial rhizomatous herb May-Sep None CE G1 S1 1B.1 SB_BerrySB; SB_CalBG/RSABG; USFS_S Altered flood/tidal/hydrologic regime, Development, Erosion/runoff, Foot traffic/trampling, Grazing, Non-native plant impacts, ORV activity, Other, Recreational use (non-ORV), Vandalism/dumping/litter, Waterway bank protection/maintenance Lower montane coniferous forest, Meadows and seeps Decomposed granitic 1890 1905 6200 6250 1974-01-01
No Photo Available
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
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
Packera ionophylla Tehachapi ragwort Asteraceae perennial herb Jun-Jul None None G4 S4 4.3 SB_CalBG/RSABG Lower montane coniferous forest, Upper montane coniferous forest Granitic, Rocky 1500 2700 4920 8860 Yes 1974-01-01
No Photo Available
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 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. 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
Trifolium amoenum two-fork clover Fabaceae annual herb Apr-Jun FE None G1 S1 1B.1 SB_CalBG/RSABG; SB_UCBG; SB_USDA Development, Erosion/runoff Coastal bluff scrub, Valley and foothill grassland (sometimes serpentinite) 5 415 15 1360 Yes 1974-01-01
No Photo Available
Dicentra nevadensis Tulare County bleeding heart Papaveraceae perennial rhizomatous herb Jun-Aug(Oct) None None G4? S4? 4.3 USFS_S Alpine boulder and rock field, Subalpine coniferous forest (gravelly, sandy, openings) 2200 3050 7220 10005 Yes 1974-01-01 Photo of Dicentra nevadensis
© 2016 Debra L Cook
Eriogonum tripodum tripod buckwheat Polygonaceae perennial deciduous shrub May-Jul None None G4 S4 4.2 USFS_S Chaparral, Cismontane woodland Serpentine (often) 200 1600 655 5250 Yes 1974-01-01 Photo of Eriogonum tripodum
©2008 Steven Perry
Eschscholzia lemmonii ssp. kernensis Tejon poppy Papaveraceae annual herb (Feb)Mar-May None None G5T2 S2 1B.1 BLM_S; SB_CalBG/RSABG; SB_SBBG; SB_USDA Grazing, Mining, Non-native plant impacts, Road/trail construction/maint. Chenopod scrub, Valley and foothill grassland 160 1000 525 3280 Yes 1994-01-01
No Photo Available
Hesperolinon tehamense Tehama County western flax Linaceae annual herb May-Jul None None G2 S2 1B.3 BLM_S Non-native plant impacts, Other, Road/trail construction/maint. Chaparral, Cismontane woodland Serpentine 100 1250 330 4100 Yes 1994-01-01 Photo of Hesperolinon tehamense
© 2018 John Doyen
Psilocarphus elatior tall woolly-marbles Asteraceae annual herb May-Aug None None G4 S2S3 4.3 Meadows and seeps, Valley and foothill grassland, Vernal pools Vernally Mesic 915 1610 3000 5280 1994-01-01
No Photo Available
Carex tiogana Tioga Pass sedge Cyperaceae perennial herb Jul-Aug None None G1Q S1 1B.3 USFS_S Foot traffic/trampling Meadows and seeps (lake margins, mesic) 3100 3300 10170 10825 1994-01-01
No Photo Available
Bulbostylis capillaris thread-leaved beakseed Cyperaceae annual herb Jun-Aug None None G5 S3 4.2 IUCN_LC Lower montane coniferous forest, Meadows and seeps, Upper montane coniferous forest 395 2075 1295 6810 2001-01-01 Photo of Bulbostylis capillaris
©2016 Ryan Batten
Carex tahoensis Tahoe sedge Cyperaceae perennial rhizomatous herb Jul-Aug None None G5 S4 4.3 Alpine boulder and rock field, Subalpine coniferous forest (rocky) 2835 3810 9300 12500 2001-01-01
No Photo Available
Clarkia gracilis ssp. tracyi Tracy's clarkia Onagraceae annual herb Apr-Jul None None G5T3 S3 4.2 SB_CalBG/RSABG Chaparral (openings, serpentinite) 65 650 215 2135 Yes 2001-01-01
No Photo Available
Cryptantha incana Tulare cryptantha Boraginaceae annual herb Jun-Aug None None G2 S2 1B.3 SB_CalBG/RSABG; USFS_S Lower montane coniferous forest (gravelly, rocky) 1430 2150 4690 7055 Yes 1974-01-01
No Photo Available
Draba praealta tall draba Brassicaceae perennial herb Jul-Aug None None G5 S3 2B.3 SB_CalBG/RSABG Meadows and seeps (mesic) 2500 3415 8205 11205 2001-01-01
No Photo Available
Eriastrum tracyi Tracy's eriastrum Polemoniaceae annual herb May-Jul None CR G3Q S3 3.2 USFS_S Development, Erosion/runoff, Foot traffic/trampling, Grazing, Improper burning regime, Logging, Mining, Non-native plant impacts, ORV activity, Other, Recreational use (non-ORV), Road/trail construction/maint., Vandalism/dumping/litter, Wood cutting or brush clearing Chaparral, Cismontane woodland, Valley and foothill grassland 315 1780 1035 5840 Yes 1974-01-01 Photo of Eriastrum tracyi
© 2012 Neal Kramer
Gilia tenuiflora ssp. amplifaucalis trumpet-throated gilia Polemoniaceae annual herb Mar-Apr None None G3G4T3 S3 4.3 Cismontane woodland, Valley and foothill grassland Sandy 390 900 1280 2955 Yes 2001-01-01
No Photo Available
Mentzelia torreyi Torrey's blazing star Loasaceae perennial herb Jun-Aug None None G4 S2 2B.2 SB_CalBG/RSABG Development, Erosion/runoff, Foot traffic/trampling, Non-native plant impacts Great Basin scrub, Mojavean desert scrub, Pinyon and juniper woodland Alkaline, Rocky, Sandy, Volcanic (usually) 1170 2835 3840 9300 2001-01-01
No Photo Available
Mertensia cusickii Toiyabe bluebells Boraginaceae perennial herb Jun-Jul None None G4? S2 2B.2 Great Basin scrub, Meadows and seeps 1495 2500 4905 8205 2001-01-01
No Photo Available
Oreostemma elatum tall alpine-aster Asteraceae perennial herb Jun-Aug None None G2 S2 1B.2 SB_UCSC; USFS_S Altered flood/tidal/hydrologic regime, Foot traffic/trampling, Grazing, Logging, Non-native plant impacts, Road/trail construction/maint., Wood cutting or brush clearing Bogs and fens, Meadows and seeps, Upper montane coniferous forest Mesic 1005 2100 3295 6890 Yes 2001-01-01
No Photo Available
Penstemon thompsoniae Thompson's beardtongue Plantaginaceae perennial herb May-Jun None None G4 S1 2B.3 SB_CalBG/RSABG Recreational use (non-ORV) Pinyon and juniper woodland (gravelly, carbonate) 1500 2700 4920 8860 2001-01-01
No Photo Available
Rhinotropis acanthoclada thorny milkwort Polygalaceae perennial shrub May-Aug None None G4 S2S3 2B.3 Development, Mining, ORV activity Chenopod scrub, Joshua tree "woodland", Pinyon and juniper woodland 760 2285 2495 7495 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
Pohlia tundrae tundra thread moss Mielichhoferiaceae moss None None G3 S3 2B.3 Alpine boulder and rock field (gravelly, damp soil) 2700 3000 8860 9845 2001-01-01 Photo of Pohlia tundrae
©2014 Dean Wm. Taylor
Meesia triquetra three-ranked hump moss Meesiaceae moss Jul None None G5 S4 4.2 Foot traffic/trampling, Grazing, Logging, ORV activity, Other Bogs and fens, Meadows and seeps, Subalpine coniferous forest, Upper montane coniferous forest (mesic) 1300 2953 4265 9690 2001-01-01 Photo of Meesia triquetra
Steve Matson 2008
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
Dacryophyllum falcifolium tear drop moss Hypnaceae moss None None G2 S2 1B.3 USFS_S North Coast coniferous forest Carbonate 50 275 165 900 Yes 2006-09-25
No Photo Available
Calystegia collina ssp. tridactylosa three-fingered morning-glory Convolvulaceae perennial rhizomatous herb Apr-Jun None None G4T1 S1 1B.2 BLM_S Development, Road/trail construction/maint. Chaparral, Cismontane woodland Gravelly, Openings, Rocky, Serpentine 0 600 0 1970 Yes 2006-11-17
No Photo Available
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
Eriogonum callistum Tehachapi buckwheat Polygonaceae perennial herb May-Jul None None G1 S1 1B.1 SB_CalBG/RSABG Development Chaparral Openings, Rocky 1400 1730 4595 5675 Yes 2008-10-14
No Photo Available
Lysimachia thyrsiflora tufted loosestrife Myrsinaceae perennial herb May-Aug None None G5 S1? 2B.3 Marshes and swamps, Meadows and seeps (mesic), Upper montane coniferous forest 975 1675 3200 5495 2009-01-06 Photo of Lysimachia thyrsiflora
©2016 Keir Morse
Astragalus tidestromii Tidestrom's milk-vetch Fabaceae perennial herb (Jan)Apr-Jul None None G4 S2 2B.2 SB_CalBG/RSABG; USFS_S Biocides, Development, Erosion/runoff, Grazing, Mining, Non-native animal impacts, Non-native plant impacts, ORV activity, Other, Road/trail construction/maint. Mojavean desert scrub Carbonate, Gravelly (sometimes), Sandy (sometimes) 600 1785 1970 5855 2009-01-06
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
Lycium torreyi Torrey's box-thorn Solanaceae perennial shrub (Jan-Feb)Mar-Jun(Sep-Nov) None None G4G5 S3 4.2 Mojavean desert scrub, Sonoran desert scrub Rocky, Sandy, Streambanks, Washes -50 1220 -165 4005 2015-05-05
No Photo Available
Boechera tularensis Tulare rockcress Brassicaceae perennial herb (May)Jun-Jul(Aug) None None G3 S3 1B.3 SB_CalBG/RSABG; USFS_S Foot traffic/trampling, Grazing, Improper burning regime, ORV activity, Recreational use (non-ORV), Road/trail construction/maint. Subalpine coniferous forest, Upper montane coniferous forest Roadsides (sometimes), Rocky, Slopes 1825 3350 5990 10990 Yes 2011-07-05
No Photo Available
Ephedra torreyana Torrey's Mormon-tea Ephedraceae perennial evergreen shrub May None None G5 S1 2B.1 Development, Non-native plant impacts, ORV activity Great Basin scrub 765 810 2510 2660 2012-02-08
No Photo Available
Artemisia tripartita ssp. tripartita threetip sagebrush Asteraceae perennial shrub Aug None None G5T4T5 S2 2B.3 Upper montane coniferous forest (openings) Rocky, Volcanic 2200 2600 7220 8530 2012-08-20
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
Climacium dendroides tree climacium moss Climaciaceae moss None None G5 S1 2B.1 Altered flood/tidal/hydrologic regime, Grazing, Improper burning regime Bogs and fens (edges), North Coast coniferous forest (streams) 1485 1485 4870 4870 2014-05-05 Photo of Climacium dendroides
©2021 Scot Loring
Grimmia torenii Toren's grimmia Grimmiaceae moss None None G2 S2 1B.3 BLM_S Chaparral, Cismontane woodland, Lower montane coniferous forest Carbonate, Openings, Rocky, Volcanic 325 1160 1065 3805 Yes 2014-05-14 Photo of Grimmia torenii
©2021 Scot Loring
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
Iris thompsonii Thompson's iris Iridaceae perennial rhizomatous herb (Mar-Apr)May-Jun(Jul-Aug) None None G3 S3 4.3 Lower montane coniferous forest, North Coast coniferous forest Edges (often), Mesic (usually), Openings, Roadsides (sometimes), Serpentine (often), Streambanks (sometimes) 90 600 295 1970 2021-07-24 Photo of Iris thompsonii
© 2017 Steve Matson
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
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
Erythranthe discolor two-colored monkey flower Phrymaceae annual herb (Apr)May-Jul(Sep) None None G3 S3 4.2 Cismontane woodland, Great Basin scrub, Lower montane coniferous forest, Meadows and seeps, Pinyon and juniper woodland, Upper montane coniferous forest Granitic (usually), Openings, Seeps, Streambanks, Vernally Mesic 1370 2470 4495 8105 Yes 2023-01-07
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 26 April 2024].