Species Details

Astragalus rattanii var. jepsonianus

Jepson's milk-vetch

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Scientific Name:
Astragalus rattanii Gray var. jepsonianus Barneby
Common Name:
Jepson's milk-vetch
Family: Fabaceae
Element Code: PDFAB0F7E1
USDA Plants Symbol: ASRAJ
Synonyms/Other Names:
Lifeform: annual herb
Blooming Period: Mar-Jun
Elevation:
295 - 700 meters
970 - 2295 feet
General Habitat:
  • Chaparral
  • Cismontane woodland
  • Valley and foothill grassland
General Micro Habitat:
Micro Habitat:
  • Serpentinite (often)
Notes:
Most occurrences small and widely scattered.
Threats:
Possibly threatened by road maintenance, vehicles, renewable energy development, and non-native plants.
Taxonomy:
Other:
Total Occurrences: 54
Element Occurrence Ranks:
A B C D X U
9 14 4 1 0 26
Occurrence Status:
Historical >20 Years 20
Recent <=20 Years 34
Presence:
Presumed Extant 54
Possibly Extirpated 0
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Colusa (COL), Glenn (GLE), Lake (LAK), Napa (NAP), San Benito (SBT), Sonoma (SON), Tehama (TEH), Yolo (YOL)
Quads: Name (Quad Code)
Chrome (3912265), Cold Fork (4012226), Detert Reservoir (3812265), Gilmore Peak (3912235), Glascock Mtn. (3812283), Hall Ridge (3912276), Hough Springs (3912225), Idria (3612046), Jericho Valley (3812274), Knoxville (3812273), Leesville (3912224), Lower Lake (3812285), Lowrey (4012215), Middletown (3812275), Mount St. Helena (3812266), Newville (3912275), Paskenta (3912285), Salt Canyon (3912213), St. John Mtn. (3912246), Stonyford (3912245), Walter Springs (3812263), Whispering Pines (3812276), Wilbur Springs (3912214), Wilson Valley (3812284)
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
Original Description: Aliso 4:137 (1958)
Taxonomic Treatment: Memoirs of the New York Botanical Garden 13:1052 (1964)
Species Account: Astragalus rattanii var. jepsonianus profile for potential Species of Conservation Concern evaluation (2018)
Other: Systematic Botany 17(3):367-379 (1992) for distributional information