UW Burke Herbarium species comparison

Leaves mostly basal, long-petiolate, the blades pinnately compound, usually with 5 irregularly toothed or lobed, pointed leaflets;

cauline leaves alternate, the divisions deep, the ultimate segments linear.

Pedicels single-flowered, up to 15 cm. long;

sepals 6-9 mm. long, with soft hairs, usually reflexed, often purplish-tinged, early-deciduous;

petals 5, yellow, 9-18 mm. long;

nectary scale glabrous, fan-shaped, 0.5-1 mm. long, the lateral margins attached along the lower third;

receptacle spherical, up to 7 mm. long, hairy;

stamens 50-70;

pistils 20-50.

Achenes elliptic-obovate, compressed, 3.5 mm. long, smooth; stylar beak straight, 2.5-4 mm. long.