Taxon Report
Lupinus tidestromii GreeneTidestrom's lupine |
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Taxon Summary
Lupinus tidestromii, commonly known as Tidestrom's lupine, is a perennial rhizomatous herb in the Fabaceae that is found only in California. It occurs within Coastal dunes, growing at elevations from 0 to 100 meters. Lupinus tidestromii is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.Classification
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Scientific Name: |
Lupinus tidestromii Greene |
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Common Name: |
Tidestrom's lupine |
| Family: | Fabaceae |
| Element Code: | PDFAB2B3Y0 |
| USDA Plants Symbol: | LUTI |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial rhizomatous herb |
| Blooming Period: Apr-Jun | Apr-Jun |
| Elevation: | 0-100 (0-330) |
| General Habitats: | Coastal dunes |
| Microhabitat: | |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.1 |
| Global Rank: | G1 |
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State Rank: |
S1 |
| State List: | CE |
| Fed List: | FE |
| Other Status: | SB_CalBG/RSABG |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 21 |
| Element Occurrence Ranks: | |
| Excellent (A) | 0 |
| Good (B) | 3 |
| Fair (C) | 12 |
| Poor (D) | 2 |
| None (X) | 2 |
| Unknown (U) | 2 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Marin (MRN), Monterey (MNT), Sonoma (SON) | |
| Quads: Name (Quad Code) | |
| Arched Rock (3812342), Bodega Head (3812331), Drakes Bay (3812218), Duncans Mills (3812341), Monterey (3612158), Tomales (3812228) | |
Threat List Data from the CNDDB
| Threat List Total: | 8 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 20 | 95 % | |
| Non-native plant impacts | 16 | 76% |
| Foot traffic/trampling | 11 | 52% |
| Other | 7 | 33% |
| Hybridization | 7 | 33% |
| Development | 6 | 28% |
| Grazing | 4 | 19% |
| Erosion/runoff | 3 | 14% |
| Recreational use (non-ORV) | 3 | 14% |
Notes
| Seriously threatened by coastal development, trampling, hybridization with L. chamissonis, and non-native plants; properly timed grazing may be beneficial. Possibly threatened by seed predation. Includes L. tidestromii var. layneae. Only MNT Co. plants are state-listed Endangered as var. tidestromii. See Erythea 3:17 (1895) for original description. |
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Threats: |
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Taxonomy: |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 25 October 2025].