Quercus Langlassei Trel. 1924

Twigs moderate (3-4 mm.), somewhat fluted, thickly matted with persistent orange felt,
beneath which the denuded surface is rather red and glossy. Buds brown, at length glabrescent,
short-ovoid, 2 x 3 mm., the upper with persistent stipules. Leaves elliptical-oblong, very obtuse,
cordate, entire, crisped and slightly revolute, moderate (3.5-5 x 9-13 cm.), rather persistently
orange-stellate on both faces, glossy above and typically dull beneath; veins about 12-14 pairs,
often with several evanescent intermediates, forking and looped, with indistinct venulation;
petiole very yellow-tomentose, 2 x 4 mm. Fruit biennial, solitary and sessile; cup saucer-shaped,
moderate (15 mm. in diameter) with thin appressed blunt or erose tomentose scales red-brown
when abraded; acorn conical-ovoid, 10 mm. long, covered at base only.
Western Sierra Madre region of Mexico.