Taxon Report
Astragalus tidestromii (Rydb.) ClokeyTidestrom's milk-vetch |
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Species Description:
Astragalus tidestromii, commonly known as Tidestrom's milk-vetch, is a perennial herb in the Fabaceae that is found in California and elsewhere. It occurs within Mojavean desert scrub, growing at elevations from 600 to 1785 meters. Astragalus tidestromii is ranked 2B.2, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Moderately threatened in California.
Classification
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Scientific Name: |
Astragalus tidestromii (Rydb.) Clokey |
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Common Name: |
Tidestrom's milk-vetch |
| Family: | Fabaceae |
| Element Code: | PDFAB0F8X0 |
| USDA Plants Symbol: | ASTI |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial herb |
| Blooming Period: (Jan)Apr-Jul | (Jan)Apr-Jul |
| Elevation: | 600-1785 (1970-5855) |
| General Habitats: | Mojavean desert scrub |
| Microhabitat: | Carbonate, Gravelly (sometimes), Sandy (sometimes) |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 2B.2 |
| Global Rank: | G4 |
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State Rank: |
S2 |
| State List: | None |
| Fed List: | None |
| Other Status: | SB_CalBG/RSABG; USFS_S |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 72 |
| Element Occurrence Ranks: | |
| Excellent (A) | 2 |
| Good (B) | 23 |
| Fair (C) | 15 |
| Poor (D) | 4 |
| None (X) | 0 |
| Unknown (U) | 28 |
| California Endemic: False | |
| California Counties and Islands: Name (Code) | |
| Inyo (INY), San Bernardino (SBD) | |
| Quads: Name (Quad Code) | |
| Big Bear City (3411637), Blackwater Mine (3511577), Calvada Springs (3511588), Clark Mtn. (3511555), Darwin (3611735), East of Kingston Peak (3511567), East of Kingston Spring (3511557), Ivanpah Lake (3511554), Kingston Peak (3511568), Kingston Spring (3511558), Mescal Range (3511545), Mesquite Lake (3511565), Mesquite Mountains (3511566), Mound Spring (3611518), Nopah Peak (3611611), North of Tecopa Pass (3511681), Pachalka Spring (3511556), Santa Rosa Flat (3611746), Solomons Knob (3511547), State Line Pass (3511564), Stump Spring, Nev. (3511587), Turquoise Mtn. (3511548), Valley Wells (3511546) | |
Threat List Data from the CNDDB
| Threat List Total: | 10 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 42 | 58 % | |
| Non-native plant impacts | 21 | 29% |
| ORV activity | 10 | 13% |
| Road/trail construction/maint. | 10 | 13% |
| Non-native animal impacts | 6 | 8% |
| Other | 5 | 6% |
| Mining | 3 | 4% |
| Development | 2 | 2% |
| Erosion/runoff | 2 | 2% |
| Grazing | 2 | 2% |
| Biocides | 1 | 1% |
Selected References
| Proposed Addition to CRPR 2.2, G4G5 / S2 (2009) |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 20 January 2025].