Herbs perennial, low, rhizomatous, softly tomentose. Leaves mostly radical; leaf blade interrupted pinnatisect; lobes obovate, margin crenate; cauline leaves sessile among connate stipules and entire or 3-fid. Inflorescence erect, few-flowered, bracteate. Hypanthium obconic, eventually elongated, 10-ribbed. Sepals 5, valvate, persistent; epicalyx segments minute. Petals 5, yellow or white, larger than sepals. Stamens numerous, in 2 or 3 series; filaments free, persistent in fruit. Disk lining hypanthium, glabrous. Carpels numerous, inserted on short receptacle; ovule ascending from base of locule; style subterminal, erect, deciduous. Achenes numerous on columnar receptacle, included in hypanthium, compressed, rugose.
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