UW Burke Herbarium species comparison

Leaves palmately veined, with petioles up to twice as long as the blades;

leaf blades cordate-reniform, 2-5 cm. long and slightly broader, shallowly 5-7 lobed, with fine teeth.

Flowers in small clusters in the leaf axils, on long pedicels to sessile, white to pale lavender;

calyx shallowly 5-lobed, about equaling the corolla;

petals 5, clawed;

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

style branches stigmatic most of their length, not capitate;

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

Carpels flattened and strongly cross-corrugated on the back.