Taxon Details

Astragalus preussii var. preussii

Preuss' milk-vetch

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Taxon Summary:

Astragalus preussii var. preussii, commonly known as Preuss' milk-vetch, is a perennial herb in the Fabaceae that is found in California and elsewhere. It occurs within Chenopod scrub, and Mojavean desert scrub, growing at elevations from 750 to 805 meters. Astragalus preussii var. preussii is ranked 2B.1, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Seriously threatened in California.

Lifeform: perennial herb
Blooming Period: Apr-Jun
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Elevation:
750 - 805 meters
2460 - 2640 feet
General Habitats:
  • Chenopod scrub
  • Mojavean desert scrub
Microhabitat Details:
Microhabitat:
  • Clay
Notes:
Threatened by solar energy development, vehicles, and non-native plants. Field work needed. See Proceedings of the American Academy of Arts and Sciences 6:222 (1864) for original description, and Memoirs of the New York Botanical Garden 13:575-576 (1964) for taxonomic treatment.
Threats:
Taxonomy:
Threat List Total: 6
Total EOs % of EOs
EOs with Threat Listed: 18 82 %
THREAT LIST:
Non-native plant impacts 13 59%
ORV activity 11 50%
Road/trail construction/maint. 11 50%
Development 4 18%
Agriculture 3 13%
Total Occurrences: 22
Element Occurrence Ranks:
A B C D X U
1 6 7 5 0 3
Occurrence Status:
Historical >20 Years 0
Recent <=20 Years 22
Presence:
Presumed Extant 22
Possibly Extirpated 0
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
Arizona (AZ), California (CA), Nevada (NV), Utah (UT)
California Counties and Islands: Name (Code)
Inyo (INY), San Bernardino (SBD)
Quads: Name (Quad Code)
Calvada Springs (3511588), Mesquite Lake (3511565), Mesquite Mountains (3511566), Mound Spring (3611518), Nopah Peak (3611611), Shenandoah Peak (3511575), Sixmile Spring (3611621), West of Shenandoah Peak (3511576)
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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