UW Burke Herbarium species comparison

Leaves all basal, 1.5-4 cm. long, ternate to bi-ternate, the segments linear, about equal in width to the petioles.

Peduncles leafless, 2-8 cm. tall, the flowers solitary;

sepals 5, greenish, ovate-lanceolate, 4-6 mm. long;

petals 5, pale yellow, narrow, 5-8 mm. long;

nectary scale oblong-elliptic, 1 mm. long, the lateral margins free to the base;

receptacle linear, glabrous;

stamens 10-15;

achenes 35-70, spreading.

Achene with 2 bulges on the base, then narrowed to a straight beak 3-4 mm. long.