Eight species of herbaceous perennials from eastern Asia and North America. They are tufted to clump-forming with mainly basal, long-stalked palmate leaves and small five-petalled, somewhat bell-shaped flowers in cymose or paniculate clusters in summer.
Suitable plants for the shady part of a rock garden or peat bed. A well drained but not dry, humus-rich soil is best and at least half-day shade or dappled light. Propagation by seed or division in late winter or early spring.