Japan Flora: Perennial herb with elongate slender stolons; radical leaves l(M0 cm. long; stipules scarious, adnate to the base of the petioles, the rachis with short accessory leaflets, the ordinary leaflets 13-19, oblong or narrowly so, coarsely toothed, 2-5 cm. long, 7-20 mm. wide, glabrous to long-pilose on upper side, with white­woolly hairs beneath, and long silky hairs on the nerves; leaves on the stolons very small; flowers 20-30 mm. across, pedicellate, solitary, axillary on stolons; calyx-segments ovate- deltoid, 4-6 mm. long, acute; bracts of caliculus entire, broadly lanceolate, slightly smaller than the calyx-segments; petals broadly obovate; anthers elliptic; styles about 2 mm. long; achenes smooth, rounded on back. June-July. Wet saline places near the sea.

Hokkaido, Honshu (n. distr.). Korea, Ochotsk Sea region, Kuriles, Sakhalin, Kamchatka, and N. America.