突脉青冈 tu mai qing gang

Quercus elevaticostata (Q. F. Zheng) C. C. Huang.

Trees to 20 m tall. Branchlets purple-brown, minutely sulcate, glabrous, sparsely lenticellate; lenticels whitish, small. Petiole 1-2.5 cm; leaf blade narrowly elliptic to elliptic-lanceolate, (5-)8-15 × (1.5-)2.5-4 cm (to ca. 20 × 5.5 cm in budding shoot), glabrous, abaxially grayish green, adaxially green, base cuneate and decurrent on petiole, margin from middle or apically remotely and sharply serrate and sometimes glandular at serration, apex acuminate; midvein and secondary veins prominent; secondary veins 8-12 on each side of midvein. Cupule shallowly cupular, 6-8 mm × 1-1.2 cm, enclosing ca. 1/3 of nut, outside yellowish gray velutinous; bracts in (5-)7 or 8 rings, margin irregularly crenate-dentate but apical 2 or 3 entire. Nut ellipsoid to ovoid-ellipsoid, 1.5-2.2 × 1-1.2 cm, yellowish brown puberulent near apex; scar ca. 5 mm in diam., slightly convex; stylopodium persistent, 1-1.5 mm, 4- or 5-ringed, umbonate. Fr. Nov.

* 600-1000 m. Fujian