Taxon Report
Astragalus douglasii (T. & G.) Gray var. perstrictus (Rydb.) MunzJacumba milk-vetch |
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Taxon Summary
Astragalus douglasii var. perstrictus, commonly known as Jacumba milk-vetch, is a perennial herb in the Fabaceae that is found in California and elsewhere. It occurs within Chaparral, Cismontane woodland, Pinyon and juniper woodland, Riparian scrub, and Valley and foothill grassland, growing at elevations from 900 to 1370 meters. Astragalus douglasii var. perstrictus 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 douglasii (T. & G.) Gray var. perstrictus (Rydb.) Munz |
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Common Name: |
Jacumba milk-vetch |
| Family: | Fabaceae |
| Element Code: | PDFAB0F303 |
| USDA Plants Symbol: | ASDOP2 |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial herb |
| Blooming Period: Apr-Jun | Apr-Jun |
| Elevation: | 900-1370 (2955-4495) |
| General Habitats: | Chaparral, Cismontane woodland, Pinyon and juniper woodland, Riparian scrub, Valley and foothill grassland |
| Microhabitat: | Rocky |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.2 |
| Global Rank: | G5T3? |
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State Rank: |
S2S3 |
| 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: | 77 |
| Element Occurrence Ranks: | |
| Excellent (A) | 1 |
| Good (B) | 13 |
| Fair (C) | 4 |
| Poor (D) | 1 |
| None (X) | 0 |
| Unknown (U) | 58 |
| California Endemic: False | |
| California Counties and Islands: Name (Code) | |
| San Diego (SDG) | |
| Quads: Name (Quad Code) | |
| Barrett Lake (3211666), Cameron Corners (3211664), Campo (3211654), Descanso (3211675), In-ko-pah Gorge (3211661), Jacumba (3211662), Julian (3311615)?, Live Oak Springs (3211663), Morena Reservoir (3211665), Mount Laguna (3211674), Sombrero Peak (3211673), Tierra Del Sol (3211653), Tubb Canyon (3311624), Viejas Mountain (3211676) | |
Threat List Data from the CNDDB
| Threat List Total: | 9 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 38 | 49 % | |
| Development | 25 | 32% |
| ORV activity | 7 | 9% |
| Road/trail construction/maint. | 6 | 7% |
| Foot traffic/trampling | 6 | 7% |
| Other | 5 | 6% |
| Recreational use (non-ORV) | 4 | 5% |
| Landfill | 3 | 3% |
| Non-native plant impacts | 3 | 3% |
| 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 25 October 2025].