Taxon Report
Astragalus oocarpus GraySan Diego milk-vetch |
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Taxon Summary
Astragalus oocarpus, commonly known as San Diego milk-vetch, is a perennial herb in the Fabaceae that is found only in California. It occurs within Chaparral (openings), and Cismontane woodland, growing at elevations from 305 to 1524 meters. Astragalus oocarpus is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.Classification
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Scientific Name: |
Astragalus oocarpus Gray |
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Common Name: |
San Diego milk-vetch |
| Family: | Fabaceae |
| Element Code: | PDFAB0F6B0 |
| USDA Plants Symbol: | ASOO2 |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial herb |
| Blooming Period: May-Aug | May-Aug |
| Elevation: | 305-1524 (1000-5000) |
| General Habitats: | Chaparral, Cismontane woodland |
| 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: | BLM_S; SB_CalBG/RSABG; SB_CRES; USFS_S |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 55 |
| Element Occurrence Ranks: | |
| Excellent (A) | 4 |
| Good (B) | 3 |
| Fair (C) | 5 |
| Poor (D) | 3 |
| None (X) | 0 |
| Unknown (U) | 40 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| San Diego (SDG) | |
| Quads: Name (Quad Code) | |
| Aguanga (3311647), Alpine (3211677), Barrett Lake (3211666), Boucher Hill (3311638), Cuyamaca Peak (3211685), Descanso (3211675), Dulzura (3211667), El Cajon Mtn. (3211687), Julian (3311615), Mesa Grande (3311627), Mount Laguna (3211674), Otay Mountain (3211657), Palomar Observatory (3311637), Ramona (3311617), Ranchita (3311625), San Pasqual (3311618), Santa Ysabel (3311616), Tecate (3211656), Tule Springs (3211686), Viejas Mountain (3211676), Warners Ranch (3311626) | |
Threat List Data from the CNDDB
| Threat List Total: | 10 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 13 | 24 % | |
| Road/trail construction/maint. | 6 | 10% |
| Grazing | 4 | 7% |
| Development | 3 | 5% |
| Recreational use (non-ORV) | 3 | 5% |
| Foot traffic/trampling | 2 | 3% |
| Non-native plant impacts | 1 | 1% |
| Other | 1 | 1% |
| Altered flood/tidal/hydrologic regime | 1 | 1% |
| Vandalism/dumping/litter | 1 | 1% |
| Wood cutting or brush clearing | 1 | 1% |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 5 February 2025].