Quercus edithiae Skan

China (Hainan, Guangdong, Guangxi ), Vietnam; 400-1800 m ;

usually 9-10 m, but reaches 20 m;

7-15 x 3-6 cm; coriaceous; elliptical to oblong-elliptic; apex caudate, obtuse; base cuneate; crenate-denticulate in the apical 2/3; glabrous and shiny above; at first reddish-brown pubescent, then mature leaves hairless beneath; midrib flat above; 8-11 vein pairs raised beneath; tertiary veins evident abaxially; petiole 2-3 cm, glabrous;

female inflorescence 1-2 cm, bearing 2-3 flowers;

acorn 4-4.5 cm long, 2-2.5 cm wide; pointed, ellipsoid to cylindrical-ellipsoid, tomentose; singly or in pairs; enclosed 1/4 to 1/3 by cup; cup bowl-shaped, 1.5-1.7 cm long, 2.3 cm wide, 2-3 mm thick, tomentose both inside and outside, with 6-8 concentric rings, margin denticulate except 2-3 basal rings that are entire; scar 7 mm in diameter, slightly convex; stylopodium persistent, puberulent; maturing in 1 year;

not hardy; in evergreen broadleaves forests, in mountains;

– A.Camus : tome 1, p. 196, n° 9; – Flora of China n° 38; – Sub-genus Cerris, Section Cyclobalanopsis; – Section Semiserrata, sub-section Semiserratae ( Menitsky ). – Threatened (IUCN Red List Category : EN). – Similar to Q.semiserrata (but differs in having larger and thinner acorns, and leaves always obtuse); – Written sometimes “ edithae”;