UW Burke Herbarium species comparison

Leaves palmately veined, long-petiolate, with stipules 4-7 mm. long, oblong;

blades of the basal leaves cordate-reniform, shallowly lobed or with rounded teeth;

blades of the upper cauline leaves cleft to the base into 5 lobes, and these dissected into linear segments.

Flowers usually single in the leaf axils, white to deep pink, 4-5 cm. broad;

calyx deeply divided, with 5 narrow sepals and 3 bracteoles, petals 5, obcordate, with a wedge-shaped base;

filaments fused into a tube, the stamens freed from the tube single or in pairs;

style branches 10-15, equal in number to the carpels, stigmatic most of their length, not capitate;

ovary superior, the carpels in a ring around a central axis.

Carpels densely hairy on the back, separating at maturity.