Quercus errans Trel. 1924

Twigs rather stout (4-5 mm.), somewhat fluted, fleecy-tomentose. Buds red-brown,
somewhat pubescent, ovoid, 2 x 3 mm. or more. Leaves somewhat evergreen, thick,
impressed-reticulate, elliptical-oblong or obovate, rather pointed, cordate, aristately
dentate above, moderate (4-5 x 6-10 cm.), glabrous except for the midrib or puberulent
above, rusty fleecy-tomentose beneath; veins about 6-8 pairs, more or less definitely
looped: petiole tomentose, 2 x 10-15 mm. Catkins?. Fruit biennial, mostly solitary,
subsessile; cup turbinately cup-shaped, moderate (15 mm. in diameter), with thin,
coarse, appressed, very blunt, hoary scales; acorn ovoid, 15 mm. long, scarcely
one-third included.
Mexican table-land and adjacent eastern declivities.