Quercus exaristata Trel. 1924
Twigs moderate (3-4 mm.), somewhat fluted, transiently dingy-stellate, gray when denuded.
Buds ?. Leaves deciduous, elliptic-oblong, usually widened upwards, very obtuse and without
even a terminal awn, rounded or subcordate at base, entire, narrowly revolute, coriaceous,
somewhat glossy, glabrescent or somewhat scurfy in sheltered places above and paler and fleecy
in places beneath; veins about 12 pairs, branching and looped; petiole hairy, scarcely 5 mm.
long. Catkins: female 15 mm. long, glabrescent, about 3-flowered toward the end. Fruit biennial,
rather small, the shallow cup 10 mm. in diameter with thin appressed blunt rather glabrescent
brown scales.
Western Sierra Madre region of Mexico.