Leaves 2 to 10 inches long with lobed entire margins. Grows upright 1-5 feet tall with branches primarily in upper flowering portion of the plant. Leaves are alternate, clasp the stem with angled lobes. Roots, stems, and leaves exude a milky juice when broken.
Flowers pale to bright yellow.
Flowers borne on slender stalks, terminally at branch ends. Winter annual or biennial Reproduces only by seed. May overwinter as a rosette. Generally 1 stem arises from a rosette. A weed in orchards, ornatmental stock, horticultural and agronomic crops, most irrigated crops, and roadsides.