Species Information

Kingdom: Plantae
  Phylum: Anthophyta
    Class: Dicotyledoneae
      Order: Fabales
        Family: Fabaceae
          Genus: Astragalus
            Species: humillimus

Mancos Milkvetch - Astragalus humillimus

Mancos Milkvetch

Image courtesy of New Mexico Rare Plants

548928

Species Extent (New Mexico)

General Description

Diminutive, tufted, strigulose perennial forming clumps up to 3 dm across; stems up to 1 cm long; leaves crowded, up to 4 cm long, odd-pinnate, leaflets 7-11, oblong-elliptic, 0.7-2.0 mm long, petiole and rachis forming persistent spines after fall of the leaflets; inflorescence a short raceme, 1-3 flowers; calyx about 3 mm long; corolla papilionaceous, lavander to purplish, a conspicuous lighter-colored spot in the throat of the corolla tube; fruit a legume, ovate, about 4.5 mm long, 2 mm wide, 4-9 seeds. Flowers late April and early May.

Status

Global Rank: G1

State Rank: S1

Rank Metadata
State Rank: S1 Rank Changed: 10/27/1982
Rank Reviewed: 03/21/2023
Reason: <span><span>Keep as S1. No new populations and short-term trend is declining. R. Sivinski</span></span>
 
Ecological Factors
Specificity: Moderate. Generalist or community with some key requirements scarce. Range Extent: 100-250 square km (about 40-100 square miles)
Occurences: 6 - 20 Population Size: 10,000 - 100,000 individuals
Area of Occupancy: NHNM EO database Threat Summary: Climate change & severe weather - High - medium | Droughts - High - medium | Oil & gas drilling - High - medium

State Status: E

Federal Status: Listed Endangered [LE]

USFS Status:

BLM Status:

SWAP Status:

NMRP Strategy Status: Strategy Species

Observations in Natural Heritage New Mexico Database

Number of Subpopulations: 10

Number of Mapped Locations: 68

Number of Observations: 248

Observation date range: 01-01-1901 to 04-21-2020

View More Information about this species at:
  NatureServe Explorer
  New Mexico Rare Plants Website
  Environmental Conservation Online System (ECOS)

Species Related Publications

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