Distribution: Occurring in the southeastern corner in Washington; southeastern Washington to north-central Oregon.
Habitat: Stony hillsides among sagebrush and bunchgrass, often over basalt.
Flowers: Arpil-June
Origin: Native
Conservation Status: Review Group 1 in Washington (WANHP)
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PNW Herbaria: Specimen records of Astragalus howellii in the Consortium of Pacific Northwest Herbaria database.
WA Flora Checklist: Astragalus howellii checklist entry.
E-Flora BC: Astragalus howellii atlas page.
CalPhotos: Astragalus howellii photos.
USDA Plants: Astragalus howellii information.