Quercus Martensiana Trel. 1924

Twigs moderate (3 mm.), Auted, evanescently brownish stellate-lanate, becoming
dark red or brown with conspicuous white lenticels. Buds rather dull and hairy,
brown, rounded, scarcely over 2 mm. in diameter, often with persistent setaceous
stipules. Leaves deciduous, oblanceolate-elliptical or oblong to obovate, obtuse,
mucronate, rounded at base or slightly cordate, subentire or undulate to repandly
blunt-serrate, rather large (3-5 x 12 cm.), from goldensteilate above and
tawny-tomentose beneath becoming glabrous and glossy above and minutely
dingy-tomentose and somewhat loosely hairy beneath with the denuded surface
either somewhat bullate-roughened or smooth and glaucescent; veins about 12 pairs,
obscurely looped; petiole loosely hairy, 8-10 mm. long. Catkins: male about 30 mm. long,
dingy-woolly, closely flowered, the somewhat hairy roundish anthers little exserted;
female glabrescent, equally long, few-flowered above. Fruit annual, on a glabrous
peduncle 30-60 mm. long; cup half-round, moderate (some 15 mm. in diameter),
with rather broad and blunt appressed thin canescent scales; acorn subglobose, half-included.
Eastern Sierra Madre region of Mexico.