Quercus brenesii Trel. 1924

Twigs slender (2 mm.), fluted, from dingy-tomentose glabrate, reddish with more or less evident small brown lenticels.
Buds glossy brown, glabrate, ovoid or the terminal elongated and 2 x 5-6 mm. Leaves deciduous, broadly lanceolate,
acute at both ends, coarsely triangular serrate with very acute though not setaceous teeth, the intervening margin
straight, crisped, slightly revolute, moderate (3-3.5 x 8-12 cm.), green and glossy on both faces, glabrous or somewhat
fleecy on either face toward the base; veins about 10 pairs, with a number of fainter intermediates, branched and looping;
petiole dingy-tomentose, scarcely 3 mm. long. Catkins?. Fruit biennial?, the young cup with thin appressed blunt
gray-puberulent scales.