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Tygh Valley milkvetch
Scientific Name: Astragalus tyghensis
Family: Fabaceae
Category: Dicot
Growth: Forb/herb
Duration: Perennial
Other Names: OR (Tygh Valley milk-vetch)
Tygh Valley Milkvetch (Astragalus tyghensis)
Astragalus tyghensis, commonly known as Tygh Valley milkvetch, is a flowering plant belonging to the legume family. It is a perennial forb/herb.
Taxonomy and Nomenclature
- Scientific Name: Astragalus tyghensis M. Peck
- Common Name: Tygh Valley milkvetch
- Family: Fabaceae (Pea Family)
- Rank: Species
- Synonym: Astragalus spaldingii var. tyghensis (M.E. Peck) C.L. Hitchc.
Distribution and Habitat
- Tygh Valley milkvetch is endemic to Oregon.
- It is found south of Tygh Valley, in Wasco County, Oregon.
- It is associated with oak savanna sampling in the Willamette Valley.
- May be found in river valleys in sagebrush or grassland areas near the Columbia River.
Conservation Status
- It is currently listed as Threatened.
- Past range and agricultural development have negatively impacted the Tygh Valley milkvetch.
Morphological Characteristics and Growth Habits
- It is a perennial plant.
- It is a forb/herb, a non-woody plant that is not a grass.
- The plant is described as densely villous-tomentose, meaning it has long, whitish and spreading hairs on the flower stem and calyx.