Quercus conzattii Trel.

Mexico (Sierra Madre de Oaxaca, SW Puebla). 1700-2800 m;

3-10 m

6-15 cm long X 4-12 wide; obovate or suborbicular, convex; variable apex; base obtuse, cordate; margin revolute with 4-6 pairs of arisate teeth; adaxially light green, hairless except on veins; abaxially pale grey tomentose, made of stipitate fasciculate trichomes with 10-25 rays 0,4-0,8 mm long; 9-11 vein pairs, straight, impressed above; petiole 1-2 cm long, densely pubescent;

in March; male catkins with 30 flowers; female catkins 1-6 cm long, bearing 2-8 flowers;

acorn 1 cm long, 5 or more together on a 1-8 cm long infrutescence; enclosed 1/3 to 1/2 in the cup; cup 8-10 mm wide, 4-6 mm high ; maturation in August same year;

– Sub-genus Quercus, Section Lobatae, sub-section Racemiflorae – This taxon has been sometimes considered as a variety of Q. urbanii – Resembles Q. mcvaughii which differs in having larger and higher cups, only 1 or 2 acorns together, maturation biennal, fasciculate trichomes nearly sessile underneath, the pubescence being yellow.