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Abstract
Basalt milkvetch is one of the most common and widely dispersed Astragalus species (Barneby 1964; Johnson et al. 2008). It occurs in western North America from southern British Columbia to northern Mexico where annual precipitation ranges from 5 to 30 in (127-762 mm) (Tilley et al. 2017). Populations are somewhat isolated in southern British Columbia and disjunct and scattered in the mountains of interior southern California and northern Baja California (Barneby 1964). Populations are widespread and locally abundant in the Columbia Basin and Great Basin (Barneby 1989; Mansfield 2000), especially the Northern Basin and Range, Central Basin and Range, Blue Mountains, and Columbia Plateau Omernik Level III Ecoregions (Barneby 1964; Johnson et al. 2008). Basalt milkvetch occurs only in Box Elder County in Utah (Welsh et al. 2016).
Parent Publication
Citation
Gucker, Corey L.; Shaw, Nancy L. 2024. Basalt milkvetch (Astragalus filipes). In: Gucker, C.L.; Shaw, N.L., eds. Western forbs: Biology, ecology, and use in restoration. Reno, NV: Great Basin Fire Science Exchange. Online: https://westernforbs.org/species/basalt-milkvetch-astragalus-filipes/.
