Quercus potosina Trel. 1924

Twigs rather slender (2-3 mm.), little fluted, from dingy-pilose glabrescent and red-brown with prominent lenticels.
Buds dull light brown, persistently hairy, acutely ovoid,
2 x 3 mm., with rather persistent sepals. Leaves deciduous,
round-obovate, very obtuse, cordate, lowcrenate, wavy, small (2.5-3 x 3-3.5 cm.), minutely stellate-scurfy above,
densely dingy stellatetomentose beneath; veins about 8 pairs, the upper passing into minute callous points, scarcely
looped; petiole tomentose, 1.5 x 3-4 mm. Catkins?. Fruit annual, solitary or paired, at most short-peduncled; cup
half-round, moderate (15 mm. in diameter), with thin somewhat lax acute dingy-fleecy scales; acorn ovoid, scarcely