Distribution: Occurring west of the Cascades crest in Washington; southwestern British Columbia to Washington, also in California and North Carolina.
Habitat: Disturbed, moist sites and shorelines.
Flowers: June-August
Origin: Introduced from South America
Growth Duration: Annual
Conservation Status: Not of concern
[none provided]
PNW Herbaria: Specimen records of Oxybasis macrosperma in the Consortium of Pacific Northwest Herbaria database.
WA Flora Checklist: Oxybasis macrosperma checklist entry.
OregonFlora: Oxybasis macrosperma information.
E-Flora BC: Oxybasis macrosperma atlas page.
CalPhotos: Oxybasis macrosperma photos.
USDA Plants: Oxybasis macrosperma information.