Quercus motuoensis C.C.Huang

China (SE Tibet) ; to 1700 m ;

may reach 30 m tall;

7-10 x 3-4 cm ; oblong to oval-elliptic; subleathery; concolorous; hairless; apex caudate; base rounded, slightly oblique; margin entire or weakly toothed near apex; midrib impressed adaxilly; 7-9 inconspicuous, slender vein pairs; petiole hairless, 1.5-2 cm long;

acorn globose 1.5 cm in diameter; hairless; singly or paired; apex depressed; enclosed 1/2 by cup; cup 1.5 cm wide, glabrous outside, silky inside, with 6 concentric rings of slightly denticulate scales; scar 4 mm wide, slightly convex; stylopodium persistent; maturing in 1 year;

not quite hardy; broad-leaves forests;

• Sub-genus Cerris, Section Cyclobalanopsis; – Threatened (IUCN Red List Category : CR)