Species Details

Astragalus agnicidus

Humboldt County milk-vetch

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Photo of Astragalus agnicidus
©2004 Dean Wm. Taylor
Scientific Name:
Astragalus agnicidus Barneby
Common Name:
Humboldt County milk-vetch
Family: Fabaceae
Element Code: PDFAB0F080
USDA Plants Symbol: ASAG
Synonyms/Other Names:
CA Rare Plant Rank: 1B.1
Fed List: None
State List: CE (1982-04-01)
Global Rank: G2
State Rank:
S2
Other Status: SB_BerrySB; SB_CalBG/RSABG
CRPR Changes:
Add Date: 1974-01-01
Date Edited: 2021-08-25
Lifeform: perennial herb
Blooming Period: Apr-Sep
Elevation:
120 - 800 meters
395 - 2625 feet
General Habitat:
  • Broadleafed upland forest
  • North Coast coniferous forest
General Micro Habitat:
Micro Habitat:
  • Disturbed areas
  • Openings
  • Roadsides (sometimes)
Notes:
Rediscovered in 1987 by R. Sutherland, R. Bittman, and K. Berg near Miranda. Threatened by grazing, competition, logging, and road maintenance. Potentially threatened by habitat alteration and non-native plants. 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.
Threats:
Taxonomy:
Other:
Total Occurrences: 69
Element Occurrence Ranks:
A B C D X U
3 23 23 15 0 5
Occurrence Status:
Historical >20 Years 3
Recent <=20 Years 66
Presence:
Presumed Extant 69
Possibly Extirpated 0
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
California (CA)
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)
Notes:
Definitions of codes following a county and/or quad:
* Presumed extirpated
(?) Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.

Map

Presumed Extant
Counties   Quads