Taxon Report

Astragalus oocarpus Gray

San Diego milk-vetch

Print Report


  Classification
Scientific Name:
 Astragalus oocarpus Gray
Common Name:
 San Diego milk-vetch
Family: Fabaceae
Element Code: PDFAB0F6B0
USDA Plants Symbol: ASOO2
Synonyms/Other Names:

Ecology and Life History
Lifeform: perennial herb
Blooming Period: May-Aug May-Aug
Elevation: 305-1524 (1000-5000)
General Habitats: Chaparral, Cismontane woodland
Microhabitat:
Microhabitat Details:

Conservation Status
CA Rare Plant Rank: 1B.2
Global Rank: G2?
State Rank:
 S2?
State List: None
Fed List: None
Other Status: BLM_S; SB_CalBG/RSABG; SB_CRES; USFS_S
CRPR Changes:

Occurrence Data from the CNDDB
Total Occurrences: 55
Element Occurrence Ranks:
   Excellent (A) 4
   Good (B) 3
   Fair (C) 5
   Poor (D) 3
   None (X) 0
   Unknown (U) 40

Location
California Endemic:  True
California Counties and Islands: Name (Code)
San Diego (SDG)
Quads: Name (Quad Code)
Aguanga (3311647), Alpine (3211677), Barrett Lake (3211666), Boucher Hill (3311638), Cuyamaca Peak (3211685), Descanso (3211675), Dulzura (3211667), El Cajon Mtn. (3211687), Julian (3311615), Mesa Grande (3311627), Mount Laguna (3211674), Otay Mountain (3211657), Palomar Observatory (3311637), Ramona (3311617), Ranchita (3311625), San Pasqual (3311618), Santa Ysabel (3311616), Tecate (3211656), Tule Springs (3211686), Viejas Mountain (3211676), Warners Ranch (3311626)

Threat List Data from the CNDDB

Threat List Total: 10
EOs with Threat Listed: Total EOs % of EOs
13 24 %
Road/trail construction/maint. 6 10%
Grazing 4 7%
Development 3 5%
Recreational use (non-ORV) 3 5%
Foot traffic/trampling 2 3%
Non-native plant impacts 1 1%
Other 1 1%
Altered flood/tidal/hydrologic regime 1 1%
Vandalism/dumping/litter 1 1%
Wood cutting or brush clearing 1 1%

Notes
Threatened by development, road maintenance, and recreation. Possibly threatened by grazing and non-native plants.
Threats:
Taxonomy:

Selected References

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].