Distribution: Occurring on both sides of the Cascades crest in Washington; widely distributed throughout much of North America.
Habitat: Disturbed areas including fields, roadsides, and wastelots, where often escaped from cultivation.
Flowers: April-June
Origin: Introduced from Eurasia
Growth Duration: Annual, Biennial
Conservation Status: Not of concern
Pollination: Bees, flies, butterflies
[none provided]
PNW Herbaria: Specimen records of Brassica napus in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Brassica napus checklist entry
OregonFlora: Brassica napus information
E-Flora BC: Brassica napus atlas page
CalPhotos: Brassica napus photos