Oaks of the World

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  Quercus rupestris
Author Hickel & A.Camus 1923 Bull. Mus. Natl. Hist. Nat. 29: 599
Local names
Range Vietnam; 600-900 m;
Growth habit 5-6 m tall;
Leaves 4-8 x 1.5-3 cm; leathery; oval-oblong; base cuneate; apex obtuse; margin entire, undulate near apex; shiny, glabrous above; dull and glabrous beneath; ; 5-7 vein pairs; petiole 1 cm long; 
Fruits acorn 1.5-1.8 cm long, 1.3-1.5 cm in diameter, often paired, mucronate, hairy, basal scar flat or slightly depressed; covered at base only by cup; cup stalkless 0.8-1.3 cm in diameter, with 6 entire or slightly undulate-denticulate rings; annual;

Bark, twigs and

young shoot hairless;
Hardiness zone, habitat not hardy; tropical forests; 
Miscellaneous -- A. Camus : n° 53;
-- Sub-genus Cerris, Section Cyclobalanopsis;
-- Section Glauca, sub-section Glaucae (Menitsky);
-- Threatened (IUCN Red List Category : EN).

Subspecies and