Japan Flora: Tree with gray-brown to gray bark, the branchlets very resinous, pilose; leaves rhombic-ovate to narrowly ovate, 4一8 cm. long, acute or acuminate，irregularly toothed, broadly cuneate at base, pilose on nerves beneath, the lateral nerves o? 6 to 8 pairs, the petioles 5-15 mm. long, slightly pilose; fruiting aments erect, short-pedunculate, 2-2.5 cm. long, narrowly oblong, the scales glabrous, lustrous, firm, the midlobe deltoid, the lateral ones spreading, rounded, as long as the midlobe; wings about half as wide as the nut.

Hokkaido, Honshu (centr. and n. distr.). Korea, Manchuria, Ussuri, and Amur.

var. okuboi Miyabe & Tatew. Leaves with 7-9 pairs of lateral nerves; midlobe of fruiting scales longer than the lateral ones.Reported to occur in Hokkaido.