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.
USDA Plants: Thelypodium howellii information.