Quercus balsequillana Trel. 1924

Twigs rather slender (2-3 mm.), fluted, from short-floccose glabrate,
glossy red with minute pale lenticels. Buds dull straw-color, glabrous,
ovoid, scarcely 2 x 3 mm. Leaves evergreen, lance-oblong, rather obtuse,
mucronate, very cordate, entire, rather small (1.5-2.5 x 6-9 cm.), glossy,
soon glabrous or somewhat furfuraceous beneath in sheltered places;
veins about 12 pairs, evanescent beneath, obscurely looped above;
petiole somewhat fleecy, 2 x 3 mm. Catkins: male (yhoung) about 20 mm
long, glabrate, rather distantly few-flowered. Fruit ?
Western Sierra Madre region of Mexico.