Japan Flora: Tree with gray or orange­gray bark peeling off into papery thin pieces, the branchlets red-brown, glabrous, lustrous; leaves broadly ovate to nearly ovatc-orbicular, 8-14 cm. long, 6-10 cm. wide, short-acuminate, deeply cordate at base, serrate, with glandular tipped teeth, scattered pilose while young above, slightly appressed pilose on nerves and later often becoming glabrous beneath, the lat­eral nerves of 10 to 12 pairs, the petioles 25-35 mm. long; fruiting aments 2-4 in a cluster, racemose, pedicellate, pendu­lous, long-cylindric, (2-)3-7 cm. long, 6-7 mm. in diameter; fruiting scales glabrous, about 3 mm. long, 3-lobed, the lateral lobes ascending, shorter than the midlobe; nuts about 3 mm. long, the wings 2-3 times as wide as the body.  May-June. 

Hokkaido, Honshu (centr. and n. distr.). s. Kuriles.