Quercus × dysophylla Benth.

Mexico (Guanajuato, Michoacan, Hidalgo, Mexico, Veracruz, San Luis Potosi, Tlaxcala); 2000 to 2800 m;

5-20 m

4-14 cm long, 2-5 cm wide; deciduous; thick, leathery; ovate, lanceolate, or elliptic; base rounded to cordate, sometimes asymmetric; apex obtuse or pointed, aristate; margin thick, sometimes undulate, revolute, entire or slightly crenate, with sometimes an aristate tooth each side, and simple aristae (0 to 12) scattered along the margin; smooth, bright, dark green above with some fasciculate sessile hairs scattered on the limb and along midrib; densely yellowish tomentose to lanuginous beneath (stalked, fasciculate hairs 0.5 mm long, and some glandular hairs); 9-14 pairs of lateral veins, straight or slightly curved, prominent beneath; epidermis bullate; petiole hairy, coffee-coloured aging darker, 3-8 mm long;

March-April; male catkins 5-10 cm long, bearing numerous pubescent flowers; 1 or 2 pubescent female flowers on a 0.4-1 cm long axis;

acorn ovoid 1.5 cm, grey brown, solitary or paired; sessile or on a very short peduncle (1-2 mm); cupule shallow, turbinate or sometimes half-round, with thin and rounded scales, sometimes rim rolled under, enclosing half of the nut; maturing in 2 years in September-October;

– Sub-genus Quercus, section Lobatae; – Closely related to Q. crassifolia , but this one has wider, obovate, dentate leaves, abaxially yellow or orange or light brown, with an epidermis bullate and papillose; – For Govaerts & Frodin, Q.hahnii (A. Camus : n° 308) is a separate species. For Zavala-Chavez, 2003, it is a variety of Q.hintonii.