Quercus humboldtii Bonpl.

Eastern Panama; Colombia; 1000-3000 m ;

more than 30 m tall, trunk to 40 cm in diameter or more; stout trunk, rounded crown;

14 cm long, in bunches at the end of branchlets; elliptic-lanceolate; apex and base pointed; margin entire, wavy, untoothed or seldom few bristleless teeth near apex; light green, glabrous above; paler beneath with pubescence along midrib; short petiole;

acorn 5-7 cm long, 2-3 cm in diameter; brown; ovoid; cup shallow, with free, tomentose scales ; cup enclosing 1/4 to 1/3 of nut; first acorns appearing when tree is only 3 metres tall;

not hardy (zone 11); in wet mountain forests; the Southest oak of Americas;

– A. Camus : n° 320; – Sub-genus Quercus, section Lobatae;