Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to Oregon, east across most of North America to the Atlantic Coast.
Habitat: Open areas, often where moist, at low elevations.
Flowers: February-October
Origin: Introduced from central and eastern North America
Growth Duration: Perennial
Conservation Status: Not of concern
Pollination: Apomixis, bumblebees, flies
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PNW Herbaria: Specimen records of Oxalis dillenii in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Oxalis dillenii checklist entry
OregonFlora: Oxalis dillenii information
E-Flora BC: Oxalis dillenii atlas page
CalPhotos: Oxalis dillenii photos