Taxon Report
Astragalus ertterae Barneby & ShevockWalker Pass milk-vetch |
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Taxon Summary
Astragalus ertterae, commonly known as Walker Pass milk-vetch, is a perennial herb in the Fabaceae that is found only in California. It occurs within Pinyon and juniper woodland (granitic, and sandy), growing at elevations from 1705 to 1900 meters. Astragalus ertterae is ranked 1B.3, Plants Rare, Threatened or Endangered in California and Elsewhere; Not very threatened in California.Classification
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Scientific Name: |
Astragalus ertterae Barneby & Shevock |
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Common Name: |
Walker Pass milk-vetch |
| Family: | Fabaceae |
| Element Code: | PDFAB0FB30 |
| USDA Plants Symbol: | ASER6 |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial herb |
| Blooming Period: Apr-May | Apr-May |
| Elevation: | 1705-1900 (5595-6235) |
| General Habitats: | Pinyon and juniper woodland |
| Microhabitat: | |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.3 |
| Global Rank: | G2 |
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State Rank: |
S2 |
| State List: | None |
| Fed List: | None |
| Other Status: | BLM_S; SB_CalBG/RSABG; USFS_S |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 4 |
| Element Occurrence Ranks: | |
| Excellent (A) | 2 |
| Good (B) | 2 |
| Fair (C) | 0 |
| Poor (D) | 0 |
| None (X) | 0 |
| Unknown (U) | 0 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Kern (KRN) | |
| Quads: Name (Quad Code) | |
| Walker Pass (3511861) | |
Threat List Data from the CNDDB
| Threat List Total: | 4 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 3 | 75 % | |
| Grazing | 3 | 75% |
| Road/trail construction/maint. | 2 | 50% |
| Foot traffic/trampling | 1 | 25% |
| Recreational use (non-ORV) | 1 | 25% |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 3 November 2025].