Quercus austrocochinchinensis Hickel & A.Camus

Thailand, Vietnam, Laos, China (Yunnan) ; from 700 to 1000 m ;

15-20 m tall; trunk reaching 1 m in diameter;

10-15 x 3-5 cm; leathery, stiff; oblong-elliptic to lanceolate; apex shortly pointed or acuminate; base cuneate; young leaves pubescent both sides, mature leaves glabrous; bright green above; margin slightly undulate, with 2-6 pairs of short, blunt teeth along apical half; 10-15 pairs of lateral veins slightly raised above, prominent beneath; tertiary veins evident abaxially; petiole to 1-2 cm, with stellate hairs, becoming glabrous;

female inflorescences few-flowered ; flowers hairy, rusty, with  4-5 styles ;

acorn 1.3-1.8 in diameter x 1-1.4 cm long; flattened, with base truncate; yellow brown silky tomentose; enclosed completely or nearly so (except apex) in thin (2 mm), tomentose (inside and outside) cup; cup with 7-9 concentric, denticulate rings ; scar on the whole base of nut, convex; stylopodium persistent; maturing in 1 year;

not hardy; scattered in mountain forests and along streams;

– A. Camus : tome 1, p. 350, n° 74; – Sub-genus Cerris, Section Cyclobalanopsis; – Section Helferiana, sub-section Helferianae ( Menitsky ); – Threatened (IUCN Red List Category : VU). – Closely related to Q.thorelii ; – Hybridizes with Q. kerrii;