Quercus argentata Korth.

Borneo; Sumatra; Malacca; Western Java; to 2700 m on Kinabalu Mount;

30 m and more; trunk to 1 m in diam.

10-20 cm long, 3-8 cm wide; leathery; elliptic, oblong, lanceolate or oblanceolate; slightly glaucous, glabrous and bright above; dull below with dense silvery stellate tomentum, glabrescent; margin entire, revolute; apex sharply acute or acuminate; base attenuate, rounded or acute, slightly asymmetrical; 10-17 pairs of secondary veins, parallel, impressed above, strongly raised beneath, at 50-75° angled with the midrib; thin, sulcate, glabrous, 1-4 cm long petiole;

from July to September ; male inflorescences 5-10 cm long, densely hairy; male flowers hairy; female inflorescences 2-3 cm long, many flowered, densely hairy ; female flowers with 3-4 pubescent styles 1 mm long; no staminodes ;

acorn 2-3 cm long and 1.5-2 cm in diameter, ovoid or cylindrical; cup with 8-12 concentric rings, covering 1/3 to 1/2 of nut; thick ringed peduncle; maturing between October and May;

not hardy;

– A. Camus : tome 1, p. 311, n° 58; – Sub-genus Cerris, Section Cyclobalanopsis; – Section Cyclobalanoides ( Menitsky )