Distribution: Occurring west of the Cascades crest in Washington in the Lower Columbia River area; southwestern Washington to adjacent Oregon; native from southern Rocky Mountains and Great Plains to the Atlantic coast.
Habitat: Sandy riverbanks.
Flowers: June-August
Origin: Introduced from central and eastern North America
Conservation Status: Not of concern
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PNW Herbaria: Specimen records of Triplasis purpurea var. purpurea in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Triplasis purpurea var. purpurea checklist entry
OregonFlora: Triplasis purpurea var. purpurea information
E-Flora BC: Triplasis purpurea var. purpurea atlas page
CalPhotos: Triplasis purpurea var. purpurea photos