About 85 species of perennials from the northern temperate zone. They are clump to colony or tufted to mat-forming with simple to finely pinnately dissected leaves and solitary or clustered small daisy-like flowerheads usually formed of a yellow disk and white ray florets, but with a few species having yellow or pink rays.
At least some of the dwarf species are indispensable rock garden plants and most of those described here are worth trying. Any well drained soil and a sunny site are basic requirements. Propagation by division in autumn or spring. Individual basal shoots can be taken as cuttings in spring or late summer.