Taxon Report

Astragalus tricarinatus Gray

triple-ribbed milk-vetch

Print Report

Classification


Scientific Name:	Astragalus tricarinatus Gray
Common Name:	triple-ribbed milk-vetch
Family:	Fabaceae
Element Code:	PDFAB0F920
USDA Plants Symbol:	ASTR5
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: Feb-May	Feb-May
Elevation:	450-1190 (1475-3905)
General Habitats:	Joshua tree "woodland", Sonoran desert scrub
Microhabitat:	Gravelly (sometimes), Sandy (sometimes)
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.2
Global Rank:	G2
State Rank:	S2
State List:	None
Fed List:	FE
Other Status:	SB_CalBG/RSABG
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	53
Element Occurrence Ranks:
Excellent (A)	1
Good (B)	8
Fair (C)	7
Poor (D)	10
None (X)	0
Unknown (U)	27

Location


California Endemic: True
California Counties and Islands: Name (Code)
Riverside (RIV), San Bernardino (SBD)
Quads: Name (Quad Code)
Catclaw Flat (3411616), Clark Lake NE (3311643), Corn Spring (3311563), Cottonwood Spring (3311567), Desert Center (3311564), Desert Hot Springs (3311685), Durmid (3311547), East Deception Canyon (3311683), Hayfield (3311566), Joshua Tree South (3411613), Keys View (3311682), Martinez Mtn. (3311653), Morongo Valley (3411615), Myoma (3311673), Orocopia Canyon (3311557), Pilot Mountain (3311553), Red Canyon (3311556), Red Cloud Canyon (3311554), White Water (3311686), Yucca Valley South (3411614)

Threat List Data from the CNDDB


Threat List Total:	4
EOs with Threat Listed:	Total EOs	% of EOs
	5	9 %
Road/trail construction/maint.	3	5%
Foot traffic/trampling	1	1%
Grazing	1	1%
ORV activity	1	1%

Notes



Possibly threatened by pipeline maintenance and vehicles.
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 6 January 2025].