Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across most of North America to the Atlantic Coast.
Habitat: Balds, prairies, forest edge, stream banks, roadsides, fields, and other disturbed open areas generally at low elevations, often where moist.
Flowers: July-October
Origin: Introduced from Europe
Growth Duration: Perennial
Conservation Status: Not of concern
Pollination: Bumblebees, bees, butterflies, flies
[none provided]
PNW Herbaria: Specimen records of Sonchus arvensis ssp. arvensis in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Sonchus arvensis ssp. arvensis checklist entry
OregonFlora: Sonchus arvensis ssp. arvensis information
E-Flora BC: Sonchus arvensis ssp. arvensis atlas page
CalPhotos: Sonchus arvensis ssp. arvensis photos
