雷公青冈 lei gong qing gang

Quercus hui Chun, J. Arnold Arbor. 9: 126. 1928.

Trees 10-15(-20) m tall. Branchlets densely curly orangish brown tomentose, glabrescent, lenticellate; lenticels minute. Petiole 1-1.4 cm, woolly when young; leaf blade oblong-elliptic, oblanceolate, or elliptic-lanceolate, 7-13 × 1.5-3(-4) cm, subleathery, abaxially pale brown tomentose but glabrescent, base cuneate and slightly oblique, margin recurved and entire or indistinctly serrulate toward apex, apex acuminate to obtuse; midvein and secondary veins abaxially prominent, adaxially flat; secondary veins 6-10 on each side of midvein; tertiary veins abaxially slender, evident. Female inflorescences 1-2 cm; cupules 2-5, apical. Infructescence ca. 1 cm; fruit 1 or 2. Cupule shallowly bowl-shaped to deeply discoid, 4-10 mm × 1.5-3 cm, covering base of nut, outside and inside densely feltlike tawny tomentose, wall ca. 1 mm thick; bracts in 4-6 rings, margin denticulate. Nut oblate, 1.5-2 × 1.5-2.5 cm, densely tawny tomentose, glabrescent; scar 7-10 mm in diam., impressed; stylopodium raised. Fl. Apr-May, fr. Oct-Dec.

* Mixed or dense wet broad-leaved evergreen forests in mountains; 300-1200 m. Guangdong, Guangxi, Hunan