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 Glossary
  • Lifeform: perennial herb
  • Blooming Period: April - June
  • Habitat: volcanic clay, gravelly.
    • Great Basin scrub
    • Joshua tree woodland
    • Pinyon and juniper woodland
Rarity Status Glossary
  • 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 Glossary
  • 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 Glossary
  • 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 Glossary
  • 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
Suggested Citation
CNPS, Rare Plant Program. . Inventory of Rare and Endangered Plants (online edition, v8-02). California Native Plant Society, Sacramento, CA. Website http://www.rareplants.cnps.org [accessed ].
-117.375,35.875

CA
35117H4=Homewood Canyon (280B) 35117H4;35117H5=Mountain Springs Canyon (281A) 35117H5;36117B6=Coso Peak (304B) 36117B6;36117A6=Petroglyph Canyon (304C) 36117A6;36117A5=Louisiana Butte (304D) 36117A5;36117B7=Upper Centennial Flat (305A) 36117B7;36117A7=Cactus Peak (305D)? 36117A7;36117E6=Nelson Range (349C) 36117E6;36117E5=Jackass Canyon (349D) 36117E5