Japan Flora: Tree; branches loosely pilose while young; leaves ovate or ovate-elliptic, 4-7 cm. long, 2.5- 35 cm. wide, brownish when unfolded, caudate, doubly serrulate, rounded or rarely shallowly cordate at base, scattered long hairy while young, later appressed-pilose and with axillary tufts beneath, the petioles 8-12 mm. long, slender, glabrescent; peduncles 1.5-2 cm. long, glabrescent, sometimes minutely puberulous above; ament scales narrowly subovate or ovate-subdeltoid, 10-18 mm. long, with a lobule on each side at base, the margin tootlied on one or both sides; nut broadly deltoid-ovate, striate, glabrous or puberulous above.

Hokkaido, Honshu, Shikoku, Kyushu. Korea.

Korea Flora: Trees 15 m tall; bark dark gray.  Branchlets brown, glabrous.  Petiole 6-18 mm, glabrous, rarely sparsely pubescent.  Leaf blade elliptic, oblong, or ovate-lanceolate, 4-6(7.5)cm × 2-3(4)cm, abaxially sparsely villous along midvein and lateral veins, sometimes bearded in axils of lateral veins, adaxially glabrous, base subcordate, rarely rounded-cuneate or subrounded, margin doubly mucronate serrate or setiform serrate, apex acuminate, acute, or caudate; lateral veins 10-12 on each side of midvein.  Female inflorescence 5-10 cm long; peduncle slender, 1.5-5 cm, sparsely pubescent; bracts semiovate-lanceolate, 1.5-2.5 cm, subglabrous, unequally 3-lobed, middle lobe oblong, straight or subfalcate, outer margin coarsely dentate, with ovate, flattened basal lobe ca. 3 mm, inner margin entire, with ovate, inflexed basal lobe, apex acute or obtuse, bracts 40-50 per catkin; veins 4, reticulate veins prominent.  Nutlet broadly ovoid, 3 mm, glabrous except villous at apex, sparsely resinous glandular, prominently ribbed.