Taxon Report
Astragalus tricarinatus Graytriple-ribbed milk-vetch |
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Taxon Summary
Astragalus tricarinatus, commonly known as triple-ribbed milk-vetch, is a perennial herb in the Fabaceae that is found only in California. It occurs within Joshua tree "woodland", and Sonoran desert scrub, growing at elevations from 450 to 1190 meters. Astragalus tricarinatus 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 tricarinatus Gray |
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Common Name: |
triple-ribbed milk-vetch |
| Family: | Fabaceae |
| Element Code: | PDFAB0F920 |
| USDA Plants Symbol: | ASTR5 |
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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: | 450-1190 (1475-3905) |
| General Habitats: | Joshua tree "woodland", Sonoran desert scrub |
| Microhabitat: | Gravelly (sometimes), Sandy (sometimes) |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.2 |
| Global Rank: | G2 |
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State Rank: |
S2 |
| State List: | None |
| Fed List: | FE |
| Other Status: | SB_CalBG/RSABG |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 53 |
| Element Occurrence Ranks: | |
| Excellent (A) | 1 |
| Good (B) | 8 |
| Fair (C) | 7 |
| Poor (D) | 10 |
| None (X) | 0 |
| Unknown (U) | 27 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Riverside (RIV), San Bernardino (SBD) | |
| Quads: Name (Quad Code) | |
| Catclaw Flat (3411616), Clark Lake NE (3311643), Corn Spring (3311563), Cottonwood Spring (3311567), Desert Center (3311564), Desert Hot Springs (3311685), Durmid (3311547), East Deception Canyon (3311683), Hayfield (3311566), Joshua Tree South (3411613), Keys View (3311682), Martinez Mtn. (3311653), Morongo Valley (3411615), Myoma (3311673), Orocopia Canyon (3311557), Pilot Mountain (3311553), Red Canyon (3311556), Red Cloud Canyon (3311554), White Water (3311686), Yucca Valley South (3411614) | |
Threat List Data from the CNDDB
| Threat List Total: | 4 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 5 | 9 % | |
| Road/trail construction/maint. | 3 | 5% |
| Foot traffic/trampling | 1 | 1% |
| Grazing | 1 | 1% |
| ORV activity | 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 5 February 2025].