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freckled milkvetch

Scientific Name: Astragalus lentiginosus var. vitreus

Family: Fabaceae

Category: Dicot

Growth: Forb/herb

Duration: Biennial, Perennial

Other Names:

       

Astragalus lentiginosus: Freckled Milkvetch

Astragalus lentiginosus, a member of the pea family (Fabaceae), is commonly known as spotted locoweed and freckled milkvetch. Other common names include rattleweed and loco weed. It's a perennial herb native to western North America.

Considerations for Pets

  • The plant has seed pods.

Considerations for Children

  • The plant has seed pods.

Taxonomy and Nomenclature

  • Scientific Name: Astragalus lentiginosus Douglas ex Hook.
  • Family: Fabaceae (also known as Leguminosae or Pea Family)
  • Synonyms: A. lentignosus diphysus (Gray.)M.E.Jones
  • Varieties:
    • Astragalus lentiginosus var. albifolius M.E. Jones (northern freckled milkvetch, Owen's Valley milkvetch, northern speckledpod milkvetch)
    • Astragalus lentiginosus var. latus (M. E. Jones) M. E. Jones (broad-pod freckled milkvetch)
    • Astragalus lentiginosus var. negundo (Box Elder Freckled Milkvetch)
    • Astragalus lentiginosus var. idriensis (New Idria Milkvetch)
    • Astragalus lentiginosus var. palans
    • Astragalus lentiginosus var. nigricalycis
    • Astragalus lentiginosus var. fremontii (Fremont's Milkvetch)

Distribution and Habitat

  • Native to western North America.
  • Found in semi-desert environments and open areas.
  • Specifically mentioned locations include:
    • Mojave Desert (at elevations below 12000 feet)
    • Canyons of the Ancients National Monument
    • John Day River area (John Day Fossil Beds National Monument)
    • San Joaquin Valley (growing under the shade of oaks and junipers)
    • Great Basin National Park, Nevada
    • Saline Valley, Death Valley National Park, Inyo Co., Calif.
  • Also found in:
    • Canada (British Columbia)
    • Mexico
    • United States (Alabama, Arizona, Arkansas, California, Colorado, Connecticut, Florida, Georgia, Idaho, Illinois, Indiana, Iowa)

Morphological Characteristics

  • Perennial herb growing from a taproot.
  • Height: Typically grows to 16 inches, but can range from 6.3 inches to 2 feet (1.6 to 6 dm).
  • Stems: Prostrate to ascending, hairless or coated with silver hairs.
  • Leaves: Linear to widely oval, divided into 19 oval leaflets, which grow to 5/8 inches in length.
  • Blooms: April-July
  • Seed pods: 1 inch long, hairy and freckled with red.
  • Color: Purple

Quirky Facts

  • Some subspecies, like the Coachella Valley Milk-vetch and the Fish Slough Milk-vetch, are on the U.S. Endangered Species list.
  • The plant is also known as "loco weed," and "rattleweed" referring to the sound of the seed pods.