栎子青冈 li zi qing gang

Quercus blakei Skan, Hooker’s Icon. Pl. 27: t. 2662. 1901; Q. blakei var. parvifolia Merrill.

Trees to 35 m tall. Branchlets glabrous; 2nd-year branchlets densely lenticellate. Petiole slender, 1.5-3 cm, glabrous; leaf blade narrowly ovate-elliptic to obovate-oblanceolate, 7-19 × 1.5-2 cm, subleathery, reddish tomentose when young, soon glabrescent, base cuneate, margin apical 2/3 serrate, apex acuminate; midvein adaxially raised; secondary veins 8-14 on each side of midvein and abaxially raised; tertiary veins abaxially slender, evident. Female inflorescences 1-2 cm; cupules 1 or 2. Cupules saucer-shaped to shallowly bowl-shaped, 5-10 mm × 2-3 cm, covering base of nut, outside pale grayish brown tomentose, inside orangish brown sericeous, wall ca. 1 mm thick; bracts in 6 or 7 rings, margin entire or dentate. Nut ellipsoid to ovoid, 2.5-3.5 × 1.5-3 cm; scar 7-11 mm in diam., flat to depressed; stylopodium persistent, umbonate, base loosely pale grayish brown villous, late glabrescent. Fl. Mar, fr. Oct-Dec.

Dense forests on mountain valleys; 100-2500 m. Guangdong, Guangxi, Guizhou, Hainan [Laos, Vietnam]

Specimens from China that have been determined as Cyclobalanopsis chrysocalyx (Hickel & A. Camus) Hjelmquist are referable to C. blakei.