Distribution: Widely distributed throughout Washington, where it is considered a noxious weed; widely distributed throughout North America.
Habitat: Roadsides and other disturbed areas, often where dry.
Origin: Introduced from central US
Growth Duration: Annual
Conservation Status: Not of concern
Pollination: Bumblebees, bees, flies
Coarse, erect, branching annual 3-10 dm. tall, the herbage and flowers stellate-pubescent, the calyces, stems, and often the leaves covered with yellow spines 3-12 mm. long.
Leaves petiolate, 6-20 cm. long and 2-7 cm. wide, deeply pinnately lobed, the lobes broad and round-tipped, and may again be shallowly lobed.
Inflorescence of several 3- to 15-flowered racemes, attached along the stem or opposite the leaves, elongating up to 1.5 dm. in fruit; corolla rotate, light yellow, with 5 short lobes, 2-3 cm. wide; stamens 5, with one anther much longer than the other 4; style solitary; ovary superior.
Fruit a berry