Taxon Report
Astragalus preussii Gray var. preussiiPreuss' milk-vetch |
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Taxon Summary
Astragalus preussii var. preussii, commonly known as Preuss' milk-vetch, is a perennial herb in the Fabaceae that is found in California and elsewhere. It occurs within Chenopod scrub, and Mojavean desert scrub, growing at elevations from 750 to 805 meters. Astragalus preussii var. preussii is ranked 2B.1, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Seriously threatened in California.Classification
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Scientific Name: |
Astragalus preussii Gray var. preussii |
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Common Name: |
Preuss' milk-vetch |
| Family: | Fabaceae |
| Element Code: | PDFAB0F722 |
| USDA Plants Symbol: | ASPRP3 |
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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: | 750-805 (2460-2640) |
| General Habitats: | Chenopod scrub, Mojavean desert scrub |
| Microhabitat: | Clay |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 2B.1 |
| Global Rank: | G4T4 |
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State Rank: |
S1 |
| State List: | None |
| Fed List: | None |
| Other Status: | SB_CalBG/RSABG |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 22 |
| Element Occurrence Ranks: | |
| Excellent (A) | 1 |
| Good (B) | 6 |
| Fair (C) | 7 |
| Poor (D) | 5 |
| None (X) | 0 |
| Unknown (U) | 3 |
| California Endemic: False | |
| California Counties and Islands: Name (Code) | |
| Inyo (INY), San Bernardino (SBD) | |
| Quads: Name (Quad Code) | |
| Calvada Springs (3511588), Mesquite Lake (3511565), Mesquite Mountains (3511566), Mound Spring (3611518), Nopah Peak (3611611), Shenandoah Peak (3511575), Sixmile Spring (3611621), West of Shenandoah Peak (3511576) | |
Threat List Data from the CNDDB
| Threat List Total: | 6 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 18 | 82 % | |
| Non-native plant impacts | 13 | 59% |
| ORV activity | 11 | 50% |
| Road/trail construction/maint. | 11 | 50% |
| Development | 4 | 18% |
| Agriculture | 3 | 13% |
| Other | 1 | 4% |
Notes
| Threatened by solar energy development, vehicles, and non-native plants. Field work needed. See Proceedings of the American Academy of Arts and Sciences 6:222 (1864) for original description, and Memoirs of the New York Botanical Garden 13:575-576 (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 30 November 2025].