西畴青冈 xi chou qing gang

Quercus sichourensis (Hu) C. C. Huang & Y. T. Chang.

Trees to 20 m tall. Branchlets thick, slightly sulcate, sparsely hairy, lenticellate; lenticels grayish brown, rounded, raised. Petiole 2.5-3.5 cm, brown tomentose when young; leaf blade oblong to ovate-elliptic, 12-21 × 5-9 cm, thickly leathery, abaxially whitish, pilose, and barbate in vein axils, adaxially bright green, base rounded to broadly cuneate, margin beyond basal 1/4 remotely serrate, apex shortly acute; midvein adaxially impressed; secondary veins 15-18 on each side of midvein; tertiary veins abaxially conspicuous. Cupule oblate, ca. 2.5 × 3.5-5 cm, enclosing nearly all of nut, outside pale brown tomentose, inside pale orangish brown sericeous, wall ca. 1.5 mm thick; bracts in 9 or 10 rings, margin dentate. Nut oblate, ca. 2 × 3-4 cm, pale orangish tomentose, apex impressed and umbonate; scar slightly narrower than nut diam., convex.

* Broad-leaved evergreen forests in mountains; 800-1500 m. SE Yunnan