Taxon Report
Astragalus deanei (Rydb.) BarnebyDean's milk-vetch |
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Taxon Summary
Astragalus deanei, commonly known as Dean's milk-vetch, is a perennial herb in the Fabaceae that is found only in California. It occurs within Chaparral, Cismontane woodland, Coastal scrub, and Riparian forest, growing at elevations from 75 to 695 meters. Astragalus deanei is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.Classification
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Scientific Name: |
Astragalus deanei (Rydb.) Barneby |
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Common Name: |
Dean's milk-vetch |
| Family: | Fabaceae |
| Element Code: | PDFAB0F2R0 |
| USDA Plants Symbol: | ASDE |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial herb |
| Blooming Period: Feb-May | Feb-May |
| Elevation: | 75-695 (245-2280) |
| General Habitats: | Chaparral, Cismontane woodland, Coastal scrub, Riparian forest |
| Microhabitat: | |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.1 |
| Global Rank: | G1 |
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State Rank: |
S1 |
| State List: | None |
| Fed List: | None |
| Other Status: | BLM_S; USFS_S |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 28 |
| Element Occurrence Ranks: | |
| Excellent (A) | 1 |
| Good (B) | 5 |
| Fair (C) | 1 |
| Poor (D) | 2 |
| None (X) | 1 |
| Unknown (U) | 18 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| San Diego (SDG) | |
| Quads: Name (Quad Code) | |
| Alpine (3211677), Barrett Lake (3211666), Dulzura (3211667), El Cajon (3211678), El Cajon Mtn. (3211687), Jamul Mountains (3211668), Morena Reservoir (3211665), National City (3211761), Santa Ysabel (3311616), Tecate (3211656), Tule Springs (3211686) | |
Threat List Data from the CNDDB
| Threat List Total: | 8 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 10 | 36 % | |
| Erosion/runoff | 4 | 14% |
| Road/trail construction/maint. | 4 | 14% |
| Development | 3 | 10% |
| Non-native plant impacts | 3 | 10% |
| Recreational use (non-ORV) | 1 | 3% |
| Foot traffic/trampling | 1 | 3% |
| Grazing | 1 | 3% |
| Improper burning regime | 1 | 3% |
Notes
| Seriously threatened by development, vegetation/fuel management activities, foot traffic, non-native plants, and road maintenance. See North American Flora 24:355 (1929) for original description, and Memoirs of the New York Botanical Garden 13:845-846 (1964) for taxonomic treatment. |
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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 4 March 2025].