Quercus HarmsianaTrel. 1924

Twigs slender (2 mm.), fluted, glabrous and apparently transiently glaucous,
rather dull, brownish with small pale lenticels. Buds dull brown, glabrous,
round-ovoid, 2 mm. in diameter. Leaves deciduous ?, elliptical or slightly
widened upwards, very obtuse or bluntly a little acuminate, slightly cordate,
entire, narrowly revolute, moderate (3-4 x 8-9 cm.), glossy above, dull and lightly
glaucous beneath with the midrib slightly fleecy; veins some 10-15 pairs, looped;
petiole fleecy or glabrescent, 1 x 10 mm. Catkins?. Fruit annual, solitary or paired,
the peduncle scarcely 10 mm. long; cup (immature) with somewhat ribbed appressed
rather blunt tomentose scales.
Western Sierra Madre region of Mexico.