UW Burke Herbarium species comparison

Basal leaves oblanceolate, 3-toothed to twice ternately divided into linear lobes;

cauline leaves alternate, tri- or bi-ternately divided into linear segments.

Flowers solitary on slender pedicels 3-5 cm. long;

sepals 5, spreading, membranous, yellowish, 3.5-6 mm. long, hairy;

petals 5, yellow, 5-8 mm. long, obovate;

receptacle hemispheric, hairy;

nectary basal on and nearly as broad as the petal, free to the base;

stamens about 10;

pistils 5-8 in a globose cluster.

Achenes greatly compressed, nearly circular, with many spines; stylar beak stout, straight, 3 mm. long.