Japan Flora: Rhizomes short, with thickened roots; stems 30-80 cm. long, from a decumbent base, retrorsely pilose; lower cauline leaves petiolate, 5-angled, orbic­ular, somewhat depressed, cordate at base, 5-10 cm. wide, deeply 5-parted nearly to the base, the lobes rhombic-obovate, 2-fid again and with a few deep incisions, obtuse to subacute, spreading-pilose; stipules free or connate, brown, membra­nous; flowers rose-purple, 2.5-3 cm. across; sepals with long spreading hairs; petals densely white hairy near base inside; free portion of style about 5 mm. long. July-Aug.

Hok­kaido, Honshu (Mount Ibuki in Oomi, and eastvv.); rather variable.

var. nipponicum Nakai. Less pubescent with shorter, appressed hairs on stems and petioles; sepals usually without long hairs. Rather common in high mountains of Honshu (centr. and n. distr.).

var. pseudopalustre Nakai. Similar to the preceding variety but the leaves shal­lowly incised, the lobes broader; sepals often sparsely long spreading-hairy. Near seashores of Hokkaido and n. di str. of Honshu. Kuriles.