Quercus corrugata Hook.

Mexico (Chiapas, Guerrero, Hidalgo, Oaxaca, Puebla, Veracruz); Belize; Costa Rica; El Salvador; Guatemala; 850-2300 m;

may reach more than 50 m tall; trunk to 2.5 m in diameter;

5-20 cm x 2-7; deciduous; subcoriaceous; elliptic to elliptic-lanceolate; apex acuminate; base cuneate or attenuate, sometimes rounded, asymmetrical; margin slightly or not revolute, sometimes wavy, entire or more often with 8-16 pairs of mucronate teeth except near base; hairless, shiny above; almost identical beneath, sometimes with scattered stellate pubescence; 11-18 vein pairs raised under; petiole becoming glabrous, 1.5-4 cm long;

staminate catkins 5-6 cm long; pistillate ones 0.5 cm long, 1-2 flowered;

acorn subglobose or broadly ellipsoid, 3-4 cm long, 2-2.5 cm wide, tomentose at apex, subsessile, solitary; cup halfround, 3-5 cm wide, with appressed, tomentose, basally thickened scales, enclosing 1/3 of nut; maturing first year from August to October;

not hardy zone 7;

– Sub-genus Quercus, Section Quercus, Series Leucomexicanae; – For Govaerts & Frodin 2007, and for Tracey Parker (Trees of Guatemala, 2008), it is a synonym of Q.lancifolia. – For S.Valencia, 2017, Q. corrugata is different from Q. lancifolia in having glabrous or glabrate leaves, subcoriaceous blades, the lack of teeth only at base, a greater number of secondary veins, larger fruits, cupules with basally thickened scales (See differences HERE ).