Distribution: Occurring chiefly west of the Cascades crest in Washington; Washington to California, east to Alberta, Idaho, Montana, and Colorado, and east from the Great Plains to the Atlantic Coast.
Habitat: Ponds and standing water at low elevations.
Origin: Native
Growth Duration: Perennial
Conservation Status: Not of concern
[none provided]
PNW Herbaria: Specimen records of Wolffia columbiana in the Consortium of Pacific Northwest Herbaria database.
WA Flora Checklist: Wolffia columbiana checklist entry.
OregonFlora: Wolffia columbiana information.
E-Flora BC: Wolffia columbiana atlas page.
CalPhotos: Wolffia columbiana photos.
USDA Plants: Wolffia columbiana information.