黄背青冈 huang bei qing gang

Quercus poilanei Hickel & A. Camus, Ann. Sci. Nat., Bot., ser. 10, 3: 384. 1921.

Trees to 16 m tall. Branchlets densely pale orangish brown feltlike tomentose. Petiole 1-1.5 cm, tawny tomentose when young, glabrescent; leaf blade elliptic to obovate-elliptic, 4-8 × 3-6 cm, tawny stellate tomentose when young, abaxially hairs persisting or glabrescent, adaxially glabrescent, base rounded to broadly cuneate, margin apically few serrulate or entire, apex acuminate to shortly caudate; secondary veins 10-15 on each side of midvein, adaxially impressed; tertiary veins abaxially conspicuous to inconspicuous, ± parallel. Female inflorescences borne apically on new shoots, 1-2 cm; cupules 3-7. Cupule shallowly bowl-shaped, ca. 8 mm × 1.5-1.8 cm, enclosing 1/4-1/3 of nut, outside tawny to ashy tomentose, inside pale orangish brown sericeous, wall ca. 1.8 mm thick; bracts in 7 or 8 rings, margin entire or basal 1 or 2 denticulate and apical ones crenate. Nut ellipsoid, ovoid-ellipsoid, or globose, 1.5-2 × 1.3-1.5 cm; scar 5-7 mm in diam., flat. Fl. Apr, fr. Apr of following year.

Broad-leaved evergreen forests in mountains; below 1300 m. Guangxi [N Thailand, Vietnam]