Distribution: Occurring west of the Cascades crest in lowland areas in Washington; also in California, Mississippi, and Maryland.
Habitat: Roadsides, ditches, sidewalks, wastelots, and other disturbed, open areas at low elevations.
Flowers: May-October
Origin: Introduced from Europe
Growth Duration: Biennial
Conservation Status: Not of concern
Pollination: Bees, flies, beetles, wasps
[none provided]
PNW Herbaria: Specimen records of Lactuca virosa in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Lactuca virosa checklist entry
OregonFlora: Lactuca virosa information
E-Flora BC: Lactuca virosa atlas page
CalPhotos: Lactuca virosa photos