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Idaho milkvetch
Scientific Name: Astragalus conjunctus var. conjunctus
Family: Fabaceae
Category: Dicot
Growth: Forb/herb
Duration: Perennial
Other Names:
Astragalus conjunctus
Common names include: Idaho milkvetch and stiff milkvetch.
Taxonomy and Nomenclature
- Scientific Name: Astragalus conjunctus S. Watson
- Variety: Astragalus conjunctus var. conjunctus
- Variety: Astragalus conjunctus var. rickardii S.L. Welsh, K.A. Beck & F. Caplow
- Family: Fabaceae (based on mention of a related species)
Distribution and Habitat
- Primarily found in Idaho and Oregon (specifically slopes along OR Highway 219 east of the Deschutes).
- Some related milkvetch species are found in Montana, Wyoming, Colorado, Washington, and New Mexico.
Ecological Role
- Cicer milkvetch (Astragalus cicer), is used for soil stabilization and conservation plantings.
Related Species
- Astragalus leptaleus (park milkvetch)
- Astragalus vexilliflexus var. vexilliflexus (bent-flowered milkvetch)
- Astragalus cusickii var. packardiae (Packard's milkvetch)
- Astragalus mulfordiae (Mulford's milkvetch)
- Astragalus agrestis S. Watson (field milk-vetch)
- Astragalus cicer (chickpea milkvetch)
- Astragalus terminalus
- Astragalus columbianus (Columbia milk-vetch)
- Astragalus diversifolius (Meadow milkvetch)
- Astragalus ceramicus var. ceramicus
Additional Information
- Packard's milkvetch (Astragalus cusickii var. packardiae) is considered one of the rarest plants in Idaho, discovered in 1980. Its known distribution is very limited.
- Cicer milkvetch (Astragalus cicer) is a non-bloat legume used for hay, pasture, and soil stabilization.
Resources
- Idaho Conservation Data Center
- Discover Life (for biology, natural history, ecology, identification, and distribution information)
- Idaho Native Plant Society (Sage Notes publication)
- U.S. Fish and Wildlife Service (USDI FWS) in Idaho