Quercus pinalensis Trel. 1924

Twigs rather slender (2-3 mm.), fluted, glabrous, dull blackish red, with small pale lenticels.
Buds ?. Leaves deciduous ?, broadly oblanceolate, acute or subacuminate, cuneate to somewhat
rounded at base, very coarsely and bluntly serrate-lobed, minutely cartilaginous-revolute,
large (6-10 x 15-25 cm.), slightly glossy green, glabrous; veins about 10-12 pairs, branching and
looped; petiole glabrous, about 2 x 5 mm. Flowers and fruit?.
Western Sierra Madre region of Mexico.