Taxon Report

Astragalus pachypus Greene var. jaegeri Munz & McBurney

Jaeger's milk-vetch

Print Report


Taxon Summary

Astragalus pachypus var. jaegeri, commonly known as Jaeger's milk-vetch, is a perennial shrub in the Fabaceae that is found only in California. It occurs within Chaparral, Cismontane woodland, Coastal scrub, and Valley and foothill grassland, growing at elevations from 365 to 975 meters. Astragalus pachypus var. jaegeri is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.


  Classification

Scientific Name:
Astragalus pachypus Greene var. jaegeri Munz & McBurney
Common Name:
Jaeger's milk-vetch
Family: Fabaceae
Element Code: PDFAB0F6G1
USDA Plants Symbol: ASPAJ
Synonyms/Other Names:

Ecology and Life History

Lifeform: perennial shrub
Blooming Period: Dec-Jun Dec-Jun
Elevation: 365-975 (1200-3200)
General Habitats: Chaparral, Cismontane woodland, Coastal scrub, Valley and foothill grassland
Microhabitat: Rocky (sometimes), Sandy (sometimes)
Microhabitat Details:

Occurrence Data from the CNDDB

Total Occurrences: 18
Element Occurrence Ranks:
   Excellent (A) 1
   Good (B) 1
   Fair (C) 0
   Poor (D) 1
   None (X) 0
   Unknown (U) 15
California Endemic:  True
California Counties and Islands: Name (Code)
Riverside (RIV), San Diego (SDG)
Quads: Name (Quad Code)
Beaumont (3311688), Blackburn Canyon (3311667), Bucksnort Mtn. (3311645), Cabazon (3311687), Lakeview (3311771), Sage (3311658), San Jacinto (3311678), Temecula (3311742), Vail Lake (3311648), Warner Springs (3311636)

Threat List Data from the CNDDB

Threat List Total: 7
EOs with Threat Listed: Total EOs % of EOs
4 22 %
Development 2 11%
Foot traffic/trampling 1 5%
Grazing 1 5%
Other 1 5%
Road/trail construction/maint. 1 5%
Agriculture 1 5%
Dam/Inundation 1 5%

Notes

To be looked for in northern SDG Co., west of Warner Springs. Some habitat probably lost during creation of Vail Lake; also threatened by urbanization, vehicles, road maintenance, and agriculture. See Bulletin of the Southern Academy of Sciences 31:67 (1932) for original description, and Memoirs of the New York Botanical Garden 13:489 (1964) for taxonomic treatment.
Threats:
Taxonomy:
Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 3 July 2025].