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Geyer's milkvetch
Scientific Name: Astragalus geyeri
Family: Fabaceae
Category: Dicot
Growth: Forb/herb
Duration: Annual, Biennial
Other Names: WA (Geyer's milk-vetch)
Geyer's Milkvetch (Astragalus geyeri)
Geyer's milkvetch, scientifically known as Astragalus geyeri A. Gray, is a plant belonging to the Fabaceae (pea) family. It is also known by several common names, including Muddy River milkvetch, Geyer milkvetch, and threecorner milkvetch.
Taxonomy and Nomenclature
- Kingdom: Plantae
- Family: Fabaceae (Pea Family)
- Scientific Name: Astragalus geyeri A. Gray
- Taxonomic Rank: Variety
- Synonyms: Astragalus triquetrus A. Gray
- Subordinate Taxa:
- Astragalus geyeri A. Gray var. geyeri
- Astragalus geyeri A. Gray var. triquetrus (A. Gray) M.E. Jones
Distribution and Habitat
Astragalus geyeri is found in the United States, including the following states: Alabama, Arizona, Arkansas, California, Colorado, Connecticut, Florida, Georgia, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, and Louisiana. It has a limited distribution in Montana, primarily restricted to Carbon County. It has been observed in sand dunes, such as those near Borax Lake in the Alvord Basin.
Morphological Characteristics
- Annual, rarely persisting into the second season.
- Very slender and minutely covered with stiff, straight hairs.
- Greenish linear-oblong, notched leaflets.
- White-bluish flowers occurring below the leaves.
Ecological Role
Astragalus geyeri is a state-threatened species, sensitive to disturbance in some regions, highlighting the importance of its conservation.
Further Information
For more information about Astragalus geyeri, consider visiting these resources:
- Calflora
- The Plant List
- USDA-NRCS PLANTS Database
- Discover Life
- Dave's Garden
- Montana Natural Heritage Program