Distribution: Known historically from east of the Cascades crest in central Washington; otherwise northeast Oregon to California.
Habitat: Sagebrush desert.
Flowers: May-July
Origin: Native
Growth Duration: Biennial, Perennial
Conservation Status: Historical in Washington (WANHP)
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PNW Herbaria: Specimen records of Thelypodium howellii in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Thelypodium howellii checklist entry
OregonFlora: Thelypodium howellii information
E-Flora BC: Thelypodium howellii atlas page
CalPhotos: Thelypodium howellii photos