1 species
Show only taxa with photos
Order by:
Scientific name
Common name
Display as:
Silybum marianummilk-thistle
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; British Columbia to California, east across Canada and the southwestern U.S. to eastern North America.
Habitat: Roadsides, fields, wastelots, and other disturbed areas.
Origin: Introduced from the Mediterranean region
Flowers: May-July
Growth Duration: annual, biennial