Taxon Report
Thermopsis robusta Howellrobust false lupine |
 ©2018 Hayley Ross |
Taxon Summary
Thermopsis robusta, commonly known as robust false lupine, is a perennial rhizomatous herb in the Fabaceae that is found only in California. It occurs within Broadleafed upland forest, and North Coast coniferous forest, growing at elevations from 150 to 1500 meters. Thermopsis robusta is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.Classification
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Scientific Name: |
Thermopsis robusta Howell |
|
Common Name: |
robust false lupine |
| Family: | Fabaceae |
| Element Code: | PDFAB3Z0D0 |
| USDA Plants Symbol: | THRO4 |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial rhizomatous herb |
| Blooming Period: May-Jul | May-Jul |
| Elevation: | 150-1500 (490-4920) |
| General Habitats: | Broadleafed upland forest, North Coast coniferous forest |
| Microhabitat: | |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.2 |
| Global Rank: | G2 |
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State Rank: |
S2 |
| State List: | None |
| Fed List: | None |
| Other Status: | SB_UCSC; USFS_S |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 104 |
| Element Occurrence Ranks: | |
| Excellent (A) | 2 |
| Good (B) | 18 |
| Fair (C) | 36 |
| Poor (D) | 11 |
| None (X) | 1 |
| Unknown (U) | 36 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Del Norte (DNT), Humboldt (HUM), Mendocino (MEN), Siskiyou (SIS), Trinity (TRI) | |
| Quads: Name (Quad Code) | |
| Ah Pah Ridge (4112348), Bark Shanty Gulch (4112345), Bear Peak (4112365), Blake Mountain (4012355), Blue Creek Mtn. (4112347), Chimney Rock (4112356), Clear Creek (4112364), Deadman Point (4112384), Dillon Mtn. (4112355), Fish Lake (4112336), Hales Grove (3912377), Happy Camp (4112374), Hopkins Butte (4112325), Huckleberry Mtn. (4112363), Johnsons (4112337), Lincoln Ridge (3912366), Lonesome Ridge (4112346), Lord-ellis Summit (4012387), Maple Creek (4012377), Orleans (4112335), Slater Butte (4112373), Somes Bar (4112344), Ukonom Mtn. (4112354), Weitchpec (4112326) | |
Threat List Data from the CNDDB
| Threat List Total: | 11 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 76 | 73 % | |
| Road/trail construction/maint. | 55 | 52% |
| Logging | 44 | 42% |
| Other | 17 | 16% |
| Non-native plant impacts | 9 | 8% |
| Biocides | 5 | 4% |
| Grazing | 2 | 1% |
| Improper burning regime | 2 | 1% |
| ORV activity | 2 | 1% |
| Mining | 1 | 0% |
| Insufficient population/stand size | 1 | 0% |
| Wood cutting or brush clearing | 1 | 0% |
Selected References
| USFS Potential Species of Conservation Concern Profile |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 27 January 2025].