Japan Flora: Sto­lon if erous perennial, nearly glabrous, long-hairy on the nodes; stems 20-30 cm. long, erect; leaves narrowly ovate to ovate- oblong, 3-5 cm. long, 1.5-25 cm. wide, acuminate to very acute, broadly cuneate to rounded at base, irregularly toothed, long-hirsute on both sides or only on the upper side, the peti­oles 1-1.5 cm. long; spikes short; bracts broadly lanceolate; calyx in fruit membranous, about 4 mm. long, very sparsely glandular-puberulent, the teeth narrowly deltoid, acute to acuminate, the innermost tooth sometimes deltoid and obtuse; nutlets about 1.5 mm. long. Aug.

Hokkaido, Honshu (Mount Gassan in Uzen).