Quercus HartmaniTrel. 1924

Twigs short, slender (2 mm.), somewhat fluted, from stellate-villous glabrescent
and red-brown, the bark quickly cracking lengthwise. Buds apparently small and
rounded, redbrown, glabrous and glossy. Leaves evergreen, elliptical, acute to
obtuse, rounded at base, entire or pungently serrulate toward the end, small
(scarcely 1.5 x 3-3.5 cm.), somewhat stellate-roughened but glossy above, dull,
microscopically somewhat velvety and a little hairy along the midrib beneath; veins
about 8 pairs, looped, the venulation rather prominent beneath; petiole somewhat
hairy, 1 x 3-5 mm. Catkins: male 20 mm. long, for a time cobwebby, rather closely
flowered, the rounded glabrous anthers subinchided. Fruit annual, short-stalked;
cup half-round, small (10 mm. in diameter), with thin appressed rather acute
brown-tipped scales; acorn oblong, one-third or more included.
Western Sierra Madre region of Mexico.