Eight to ten species of perennials from western North America. They are tufted to clump-forming often with long-stalked basal leaves. The erect, more or less leafy stems bear usually solitary, daisy-like flowerheads similar to those of Helianthus.
The smaller species described here are reasonably showy and suitable for the larger rock garden. Ordinary soil and a sunny site are required. Propagation by seed or division in spring.