CNPS Inventory Plant Detail

Astragalus atratus var. mensanus

Common Name:	Darwin Mesa milk-vetch
Family:	Fabaceae
Synonyms:
Element Code:	PDFAB0F0Z3
Full Name:	Astragalus atratus Wats. var. mensanus Jones
USDA PLANTS Symbol:	ASATM

Biology
Lifeform: perennial herb Blooming Period: April - June Habitat: volcanic clay, gravelly. • Great Basin scrub • Joshua tree woodland • Pinyon and juniper woodland

Rarity Status

CA Rare Plant Rank: 1B.1
Rare, threatened, or endangered in California and elsewhere
.1: Seriously endangered in California
Federal Listing Status:
Not Listed
State Listing Status:
Not Listed
State Rank: S1
S1: Critically Imperiled.
Global Rank: G4G5T1
T1: Critically Imperiled. G4: (species) Apparently secure, considering populations outside California. G5: (species) Secure, considering populations outside California.

Occurrence Data from DFG
California Natural Diversity Database

Total # of Known Element Occurrences: 9
Element Occurrence Ranks:

A B C D X U

0 0 0 0 0 9

Population Status:

Historic >20 yrs	Recent <=20 yrs
2	7

Presence:

Present Extant	Possibly Extirpated	Extirpated
9	0	0

Notes
Threatened by grazing. See Memoirs of the New York Botanical Garden 13:473 (1964) for taxonomic treatment. To submit rare plant observation data, use the CNDDB field survey form. Please see also the CNPS Rare Plant Data page. Date Added: 1980-01-01 Last Update: 2010-03-15

Location

Elevation: 1340 - 2315 meters

California Endemic: yes

States: California

California Counties and Islands: name (code)
Inyo (INY)

Quads: name (DWR code) USGS code
Homewood Canyon (280B) 35117H4, Mountain Springs Canyon (281A) 35117H5, Coso Peak (304B) 36117B6, Petroglyph Canyon (304C) 36117A6, Louisiana Butte (304D) 36117A5, Upper Centennial Flat (305A) 36117B7, Cactus Peak (305D)? 36117A7, Nelson Range (349C) 36117E6, Jackass Canyon (349D) 36117E5

Notes:

Definitions of codes preceding a county and/or quad:
*		Presumed extirpated
?		Uncertain about distribution or identity
?*		Uncertain about distribution, but presumed extirpated if once present
(?)		Occurrence confirmed, but possibly extirpated

Species may be present in other areas where conditions are favorable.

Presumed Extant

Presumed Extirpated or Unknown

294

Links to Leading Resources of Taxon Information
USDA PLANTS Calflora CalPhotos Consortium of California Herbaria California Department of Fish and Game: CNDDB Quick Viewer

Suggested Citation
California Native Plant Society (CNPS). Inventory of Rare and Endangered Plants (online edition, v8-01a). California Native Plant Society. Sacramento, CA. Accessed on .

-117.625,36.125