Quercus tlapuxahuensis A. de Candolle 1864

Twigs moderate (3 mm.), somewhat fluted, glabrous, dull blackish or gray with prominent small
lenticels. Buds dull brown, loosely hairy above, ovoid, 2 x 3-4 mm. Leaves deciduous ?, lanceolate,
rather aristately acute, rounded at base, moderate (2.5-3.5 x 7-9 or 10 cm.), entire, very minutely
revolute, glossy, glabrous except for axillary tufts beneath, or the midrib slightly puberulent above;
veins about 12 pairs, with fainter intermediates, forking and looped; petiole puberulent above,
1 x 10-20 mm. Catkins?. Fruit annual, subsessile or on a peduncle scarcely 3 x 10 mm., occasionally
appearing to be biennial, perhaps from a renewed growth of the end of the shoot; cup half-round,
moderate (15 mm. in diameter), with appressed obtuse finely tomentose or by abrasion glossy
brown scales somewhat revolutely thickened in part; acorn short-ovoid, 15 mm. long, fully half-included.
Western Sierra Madre region of Mexico