UW Burke Herbarium species comparison

Basal leaves numerous, the blades 3-10 cm. broad, divided into 3 or 5 sections and cleft 2-3 times, the ultimate segments 2+ mm. broad; the flowering stem naked except for a whorl of 3 leaves near the midpoint, these similar to but smaller than the basal leaves.

Basal leaves usually one, thin, trifoliate, mostly glabrous, the leaflets 1-3 cm. long, bi-serrate with rounded teeth, the lateral pair often deeply lobed; the flowering stem naked except for a whorl of 3 leaves near the midpoint, these similar to the basal leaves.

Flowers usually 2 or 3;

sepals 5-9, oblong-elliptic, 7-15 mm. long, yellowish and tinged with red, blue or purple, especially on the outer surface;

petals none;

stamens and pistils numerous.

Flowers single;

sepals usually 5, white, or sometimes bluish or pinkish, oblong, 6-10 mm. long;

petals none;

stamens 12-20;

pistils numerous.

Achenes in a globose cluster, silky-woolly with hairs 3-8 mm. long;

styles stout, 1-1.5 mm. long, reddish

Achenes ovate, 3-4 mm. long, finely pubescent;

style 0.5 mm. long.