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Species Information

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

Chuska Mt Milkvetch - Astragalus chuskanus

Chuska Mt Milkvetch

Image courtesy of New Mexico Rare Plants

324800

Species Extent (New Mexico)

General Description

Matted perennial herb; stems spreading on ground (humistrate), freely branching, densely leafy, to 4 dm long; herbage densely hairy with soft, fine, basifixed hairs; stipules connate; leaves silvery-gray, 1.5-4 cm long; leaflets 9-15, obovate or oblong-elliptic, 2.5-9 mm long, 1-3 mm wide; racemes shortly but loosely 4-10 flowered; flowers pea-like; calyx about 5.5 mm long; petals whitish, fading to ochroleucous, often blushed with lilac or dull purple; pods lying on the ground, twisted on the stalk and ascending, sessile, obliquely semi-ovoid, pilosulous, 6 mm long (excluding the persistent style base), 3 mm wide. A second phase has been recognized as the variety <i>spellenbergii</i> (Welsh 2007). This variety is more robust, tends to bear greenish leaflets that are flat, with a calyx 5.5 - 6.9 mm long, tube 3-3.8 mm long and teeth 2-3.1 mm long, and a banner measuring 8-10 mm long, vs. calyx 4.5-5.3 mm long, tube 2.5-3.2 mm, teeth 1.5-2.6 mm long, a banner 7.3-8 mm. Flowers late May through July.

Status

Global Rank: G3

State Rank: S3

State Status:

Federal Status:

USFS Status:

BLM Status:

SWAP Status:

NMRP Strategy Status: Strategy Species

Observations in Natural Heritage New Mexico Database

Number of Subpopulations: 16

Number of Mapped Locations: 20

Number of Observations: 21

Observation date range: 08-24-1961 to 08-06-2005

External Links

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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