Species Details

Astragalus tener var. ferrisiae

Ferris' milk-vetch

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Scientific Name:
Astragalus tener Gray var. ferrisiae Liston
Common Name:
Ferris' milk-vetch
Family: Fabaceae
Element Code: PDFAB0F8R3
USDA Plants Symbol: ASTEF
Synonyms/Other Names:
Lifeform: annual herb
Blooming Period: Apr-May
Elevation:
2 - 75 meters
5 - 245 feet
General Habitat:
  • Meadows and seeps (vernally mesic)
  • Valley and foothill grassland (subalkaline flats)
General Micro Habitat:
Micro Habitat:
Notes:
Rediscovered in 1989 by V. Oswald in Butte Sink WA (DFG); known only from six extant occurrences. Most historical habitat destroyed by agriculture. See Brittonia 42(2):100-104 (1990) for original description, and Systematic Botany 17(3):367-379 (1992) for distributional information.
Threats:
Taxonomy:
Other:
References:
Total Occurrences: 18
Element Occurrence Ranks:
A B C D X U
1 0 0 1 5 11
Occurrence Status:
Historical >20 Years 17
Recent <=20 Years 1
Presence:
Presumed Extant 13
Possibly Extirpated 5
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Butte (BUT), Colusa (COL), Glenn (GLE), Solano (SOL)*, Sutter (SUT), Yolo (YOL), Yuba (YUB)
Quads: Name (Quad Code)
Arbuckle (3912211)*, Butte City (3912148), Colusa (3912221)*, Davis (3812156), Dozier (3812137)*, Dunnigan (3812188)*, Grimes (3912118), Llano Seco (3912158), Logandale (3912242), Manor Slough (3912223), Merritt (3812157), Nord (3912178)*, Olivehurst (3912115), Pennington (3912137), Sacramento West (3812155), Saxon (3812146), Sutter (3912126), West of Biggs (3912147), Wildwood School (3812281), Yuba City (3912125)*
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