UW Burke Herbarium species comparison

Basal leaves long-petiolate, the blades reniform to cordate, 1.5-6 cm. long and broad, shallowly divided into 3 lobed segments;

cauline leaves similar, short-petiolate.

Pedicels single-flowered, stout, often recurved, 1-6 cm. long;

sepals 5, membranous, spreading to reflexed, 4-7 mm. long;

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

nectary scale oval, about half as broad as the basal portion of the petal, the lateral margins attach half their length;

receptacle sub-globose;

stamens about 10;

pistils usually 5.

Achenes strongly flattened, the faces with short spines; stylar beak stout, flattened, curved, about 2.5 mm. long.