These plants have attractive, cut foliage, which is often bronze-tinged when young. They produce feathery plumes of flower in summer or early autumn.
The 14 species originate in East Asia and eastern North America, where they grow in damp grassland or open woods. However, only four or five species are found in cultivation.
These plants prefer dappled shade and require a fertile, moist, but free-draining soil. They will not tolerate drought during the growing season.