Species Details

Astragalus inversus

Susanville milk-vetch

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Photo of Astragalus inversus
©2021 Steve Matson
Photo of Astragalus inversus
©2021 Steve Matson
Photo of Astragalus inversus
©2021 Steve Matson

Species Description:

Astragalus inversus, commonly known as Susanville milk-vetch, is a perennial herb in the Fabaceae that is found only in California. It occurs within Great Basin scrub, Lower montane coniferous forest, and Pinyon and juniper woodland, growing at elevations from 885 to 1850 meters. Astragalus inversus is ranked 4.3, Plants of Limited Distribution, A Watch List; Not very threatened in California.

Lifeform: perennial herb
Blooming Period: May-Sep
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Elevation:
885 - 1850 meters
2905 - 6070 feet
General Habitats:
  • Great Basin scrub
  • Lower montane coniferous forest
  • Pinyon and juniper woodland
Microhabitat Details:
Microhabitat:
  • Disturbed areas (often)
Notes:
Possibly threatened by vehicles, grazing, fire, logging, and pipeline construction.
Threats:
Taxonomy:
Total Occurrences: 0
Element Occurrence Ranks:
A B C D X U
0 0 0 0 0 0
Occurrence Status:
Historical >20 Years 0
Recent <=20 Years 0
Presence:
Presumed Extant 0
Possibly Extirpated 0
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Lassen (LAS), Modoc (MOD), Shasta (SHA), Siskiyou (SIS)
Quads: Name (Quad Code)
Antelope Mtn. (4012058), Bieber (4112112), Bogard Buttes (4012152), Boles Meadows East (4112067), Bullard Lake (4012078), Burney (4012186), Burney Falls (4112116), Burney Mtn. East (4012175), Burney Mtn. West (4012176), Cassel (4012185), Champs Flat (4012068), Corders Reservoir (4012172), Crank Mountain (4112142), Dana (4112115), Day (4112123), Donica Mtn. (4112132), East of Pondosa (4112125), Egg Lake (4112133), Harvey Mtn. (4012161), Hogback Ridge (4012184), Hollenbeck (4112143), Indian Spring Mtn. (4112135), Jellico (4012173), Johnstonville (4012045), Manzanita Lake (4012155), Old Station (4012164), Pine Creek Valley (4012151), Pittville (4112113), Poison Lake (4012162), Pondosa (4112126), Rimrock Lake (4112162), Roop Mountain (4012047), Snag Hill (4112146), Spalding Tract (4012067), Spaulding Butte (4112152), Susanville (4012046), Swains Hole (4012163), Timbered Crater (4112124), Viola (4012156), West Prospect Peak (4012154), Whitehorse (4112134)
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.
Presumed Extant
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