金平青冈 jin ping qing gang

Trees. Branchlets glabrous or pubescent when young. Petiole 1-1.5 cm, glabrous; leaf blade oblong-elliptic, 7-11 × 3-4.5 cm, abaxially with grayish brown simple hairs (more densely along veins), base narrowly rounded, margin shallowly serrate on apical 1/3, apex acuminate; secondary veins 12-14 on each side of midvein; tertiary veins abaxially slender, evident. Cupules solitary, sessile, bowl-shaped, ca. 1.5 × 1.8 cm, enclosing ca. 1/2 of nut, outside apically densely yellowish brown tomentose but middle and basal hairs relatively sparce; bracts in 9-11 rings, margin entire but most basal ones denticulate. Nut ovoid, ca. 1.8 × 1.5 cm, glabrous; scar ca. 1 cm in diam., flat.

* SE Yunnan (Jinping Xian)