Taxon Report

Astragalus geyeri Gray var. geyeri

Geyer's milk-vetch

Print Report

Taxon Summary

Astragalus geyeri var. geyeri, commonly known as Geyer's milk-vetch, is a annual herb in the Fabaceae that is found in California and elsewhere. It occurs within Chenopod scrub, and Great Basin scrub, growing at elevations from 1160 to 1980 meters. Astragalus geyeri var. geyeri is ranked 2B.2, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Moderately threatened in California.

Classification


Scientific Name:	Astragalus geyeri Gray var. geyeri
Common Name:	Geyer's milk-vetch
Family:	Fabaceae
Element Code:	PDFAB0F3M1
USDA Plants Symbol:	ASGEG
Synonyms/Other Names:

Ecology and Life History


Lifeform:	annual herb
Blooming Period: May-Aug	May-Aug
Elevation:	1160-1980 (3805-6495)
General Habitats:	Chenopod scrub, Great Basin scrub
Microhabitat:	Sandy
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	2B.2
Global Rank:	G4T4
State Rank:	S2
State List:	None
Fed List:	None
Other Status:
CRPR Changes:	changed from 2.2 to 2B.2 on 2013-06-12

Occurrence Data from the CNDDB


Total Occurrences:	24
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	6
Fair (C)	2
Poor (D)	1
None (X)	0
Unknown (U)	15

Location


California Endemic: False
California Counties and Islands: Name (Code)
Inyo (INY), Lassen (LAS), Mono (MNO)
Quads: Name (Quad Code)
Blackrock (3611882), Calneva Lake (4012021), Chocolate Mtn. (3711748), Deep Springs Lake (3711831), Doyle (4012011), Herlong (4012022), Indian Garden Creek (3711758), Little Mud Flat (4012042), Shaffer Mtn. (4012043), Wendel (4012032), Wendel Hot Springs (4012033), Wildrose Peak (3611731)

Threat List Data from the CNDDB


Threat List Total:	6
EOs with Threat Listed:	Total EOs	% of EOs
	19	79 %
Other	15	62%
Grazing	3	12%
ORV activity	2	8%
Road/trail construction/maint.	2	8%
Mining	1	4%
Recreational use (non-ORV)	1	4%

Notes



Possibly threatened by grazing and pipeline construction. State-listed as Sensitive in WA. See Memoirs of the New York Botanical Garden 13:894-895 (1964) for taxonomic treatment.
Threats:

Taxonomy:

Selected References

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 5 February 2025].