Perennial, with short cylindrical and long fibrous roots. Stems (30-) 60–90 cm high, with a few long, patent hairs or glabrescent, ± flaccid, branched, arising from a creeping rootstock. Basal and lowermost stem-leaves with petioles 3 cm (-7-15 according to Watt, probably with petioles included), ternate, primary segments pinnatifid to bi-pinnatifid, lobes of ultimate order oblong, obtuse, up to 2 mm wide, papery when dry, tapering towards base, sometimes petiolulate, ovate. Upper stem-leaves sessile, tripartite, rarely simple, segments entire or pinnate. Peduncle long, densely strigulose. Flowers yellow, 18 (-25) mm in diameter, yellow. Sepals up to 10 mm long, oblong-ovate, patent, densely hairy. Petals obovate-rotundate. Receptacle elongated at maturity, glabrous. Achenes 1.5-2 mm, ovate, glabrous, forming a broadly ovoid head. Style flat, recurved.