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Geyer's milkvetch
Scientific Name: Astragalus geyeri var. geyeri
Family: Fabaceae
Category: Dicot
Growth: Forb/herb
Duration: Annual, Biennial
Other Names:
Geyer's Milkvetch (Astragalus geyeri)
Geyer's milkvetch, scientifically known as Astragalus geyeri, is a plant species within the Astragalus genus. It is also known by the common names 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
- Synonym: Astragalus triquetrus A. Gray
- Varieties:
- Astragalus geyeri A. Gray var. geyeri
- Astragalus geyeri A. Gray var. triquetrus (A. Gray) M.E. Jones
Distribution and Habitat
Geyer's milkvetch 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. Within Montana, its distribution is primarily limited to Carbon County. It is also found in sandy areas, such as sand dunes near Borax Lake in the Alvord Basin.
Morphological Characteristics
- Annual, rarely persisting into a second season.
- Very slender and minutely covered with stiff, straight hairs.
- Greenish linear-oblong leaflets with notches.
- White-bluish flowers occurring below the foliage.
Ecological Information
- In Idaho, Geyer's Milkvetch (Astragalus geyeri var. geyeri) is present.
Conservation Status
- In some regions, such as within the state, Astragalus geyeri var. geyeri is considered state threatened and is assigned a BLM sensitive rank of G4T4 / S1.
Further Information
- USDA-NRCS PLANTS Database
- Calflora
- The Plant List
- ToL (Tree of Life Web Project)
- BHL (Biodiversity Heritage Library)
- Discover Life
- Dave's Garden