Taxon Report
Astragalus johannis-howellii BarnebyLong Valley milk-vetch |
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Taxon Summary
Astragalus johannis-howellii, commonly known as Long Valley milk-vetch, is a perennial herb in the Fabaceae that is found in California and elsewhere. It occurs within Great Basin scrub, growing at elevations from 2040 to 2530 meters. Astragalus johannis-howellii 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 johannis-howellii Barneby |
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Common Name: |
Long Valley milk-vetch |
| Family: | Fabaceae |
| Element Code: | PDFAB0F4H0 |
| USDA Plants Symbol: | ASJO |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial herb |
| Blooming Period: Jun-Aug | Jun-Aug |
| Elevation: | 2040-2530 (6695-8300) |
| General Habitats: | Great Basin scrub |
| Microhabitat: | |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.2 |
| Global Rank: | G2 |
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State Rank: |
S1 |
| State List: | CR |
| Fed List: | None |
| Other Status: | BLM_S; SB_SBBG; USFS_S |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 19 |
| Element Occurrence Ranks: | |
| Excellent (A) | 1 |
| Good (B) | 5 |
| Fair (C) | 0 |
| Poor (D) | 1 |
| None (X) | 0 |
| Unknown (U) | 12 |
| California Endemic: False | |
| California Counties and Islands: Name (Code) | |
| Mono (MNO) | |
| Quads: Name (Quad Code) | |
| Aurora (3811838), Convict Lake (3711857), Dome Hill (3811931), Toms Place (3711856), Watterson Canyon (3711866), West of Huntoon Spring (3811816), Whitmore Hot Springs (3711867) | |
Threat List Data from the CNDDB
| Threat List Total: | 10 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 14 | 74 % | |
| Grazing | 12 | 63% |
| ORV activity | 4 | 21% |
| Dam/Inundation | 3 | 15% |
| Foot traffic/trampling | 2 | 10% |
| Road/trail construction/maint. | 2 | 10% |
| Vandalism/dumping/litter | 1 | 5% |
| Other | 1 | 5% |
| Recreational use (non-ORV) | 1 | 5% |
| Mining | 1 | 5% |
| Non-native plant impacts | 1 | 5% |
Notes
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Threatened by grazing, vehicles, and mining. Possibly threatened by trampling and illegal dumping. Usually found in swales in vicinity of former or present hot springs activity. See Leaflets of Western Botany |
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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 21 February 2025].