Distribution: Occurring east of the Cascades crest in Washington; Washington to Montana, east across the Rocky Mountains and Great Plains to the Atlantic Coast.
Habitat: Roadsides, wastelots, and other disturbed areas near gardens, where escaping from cultivation.
Flowers: April-June
Origin: Introduced from Europe
Growth Duration: Annual
Conservation Status: Not of concern
[none provided]
PNW Herbaria: Specimen records of Rhamnus cathartica in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Rhamnus cathartica checklist entry
OregonFlora: Rhamnus cathartica information
E-Flora BC: Rhamnus cathartica atlas page
CalPhotos: Rhamnus cathartica photos