Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast.
Habitat: Usually in moist soil, often along irrigation ditches or in waste places.
Conservation Status: Not of concern
Taprooted annual or perennial, the stems erect to ascending, 3-6 dm. tall, simple to branching, often floriferous for much of its length, stiff-hairy below to sub-woolly above, not glandular.
Leaves alternate, mainly cauline; stipules well-developed, ovate, usually strongly toothed; leaflets usually 3, broadly ovate to obovate below to narrowly oblong above, 3-6 cm. long, serrate with rounded teeth, pubescent.
Inflorescence a rather compact cyme with a long peduncle; calyx 7-11 mm. broad, the 5 sepals broadly lanceolate, erect, the 5 bracteoles lanceolate and about equal in length to the sepals; petals yellow, broadly obovate, slightly shorter than the sepals; stamens usually 20; pistils numerous; style terminal, thickened basally.
Achenes light brown, 1.0-1.3 mm. long ovate, flattened.