Perennial herbs, rhizomes short. Leaves usually basal, rarely densely arranged on short stems, reniform-orbicular, or obovate-spatulate; sub sessile to long-petiolate, the margins entire or palmately lobed, ofteen toothed. Flowers in terminal umbels on the scapes, rarely solitarywhite or rose-purple, rarely yellow, the bracts small, without bracteoles; calyx tubular to infundibuliform, 5- lobed; corolla salverform or campanulate, often with appendages on the throat, the limb 5-lobed, imbricate in bud, entire or serrulate; stamens inserted on the tube, the filaments very short, the anthers obtusse; ovaryglobose or ovoid; style simple, slender. Capsules globose to cylindric, 5-valved; seeds many.
About 300 species mostly in the north temperate region, one in Taiwan.