Herbs, perennial, rhizomatous. Rhizome with homomorphic adventitious roots. Leaves undivided to pinnatipartite, margin spinulose or with spine-tipped teeth. Bracts (except outermost leaflike ones) pectinately pinnatisect to pinnatipartite. Receptacle flat or concave, densely covered with linear scales. Florets bisexual. Achene obovoid to ovoid, compressed, apex truncate. Pappus bristles in 1 row, plumose, all of one type, basally connate into a ring.
About six species: E Asia; four species (two endemic) in China.