Taxon Report
Astragalus agnicidus BarnebyHumboldt County milk-vetch |
 ©2004 Dean Wm. Taylor |
Classification
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Scientific Name: |
Astragalus agnicidus Barneby |
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Common Name: |
Humboldt County milk-vetch |
| Family: | Fabaceae |
| Element Code: | PDFAB0F080 |
| USDA Plants Symbol: | ASAG |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial herb |
| Blooming Period: (Mar)Apr-Sep | (Mar)Apr-Sep |
| Elevation: | 120-800 (395-2625) |
| General Habitats: | Broadleafed upland forest, North Coast coniferous forest |
| Microhabitat: | Disturbed areas, Openings, Roadsides (sometimes) |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.1 |
| Global Rank: | G2 |
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State Rank: |
S2 |
| State List: | CE |
| Fed List: | None |
| Other Status: | BLM_S; SB_BerrySB; SB_CalBG/RSABG |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 69 |
| Element Occurrence Ranks: | |
| Excellent (A) | 3 |
| Good (B) | 23 |
| Fair (C) | 23 |
| Poor (D) | 15 |
| None (X) | 0 |
| Unknown (U) | 5 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Humboldt (HUM), Mendocino (MEN), Santa Cruz (SCR) | |
| Quads: Name (Quad Code) | |
| Bailey Ridge (3912324), Bridgeville (4012347), Burbeck (3912344), Cahto Peak (3912365), Cold Spring (3912315), Dutchmans Knoll (3912356), Felton (3712211), Greenough Ridge (3912334), Gualala (3812375), Hales Grove (3912377), Lincoln Ridge (3912366), Mallo Pass Creek (3912316), McGuire Ridge (3812374), Miranda (4012327), Myers Flat (4012337), Navarro (3912325), Northspur (3912345), Noyo Hill (3912346), Sherwood Peak (3912355), Westport (3912367) | |
Threat List Data from the CNDDB
| Threat List Total: | 10 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 61 | 88 % | |
| Road/trail construction/maint. | 46 | 66% |
| Logging | 45 | 65% |
| Other | 32 | 46% |
| Non-native plant impacts | 12 | 17% |
| ORV activity | 11 | 15% |
| Erosion/runoff | 5 | 7% |
| Wood cutting or brush clearing | 3 | 4% |
| Biocides | 1 | 1% |
| Foot traffic/trampling | 1 | 1% |
| Grazing | 1 | 1% |
Notes
| Rediscovered in 1987 by R. Sutherland, R. Bittman, and K. Berg near Miranda. See Madroño 14(1):37-40 (1957) for original description, Fremontia 16(1):13-14 (1988) for discussion of rediscovery and 20(4):21-22 (1992) for management update, and Madroño 46(4):215 (1999) for occurrence information. |
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Threats: |
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Threatened by grazing, competition, logging, and road maintenance. Potentially threatened by habitat alteration and non-native plants. |
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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 6 January 2025].