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
half-included.