Quercus furfuracea Liebm.

Mexico, Sierra Madre Oriental (Puebla, Hidalgo, San Luis Potosi) ; 1300-2600 m;

8-15 m tall;

4-12 cm x 2.5-5; deciduous; thick, stiff, coriaceous; elliptic to ovate or lanceolate; apex pointed, bristle-tipped; base rounded, cuneate or truncate; margin not or very slightly revolute, mostly flat, often slightly crispate, with 3-10 pairs of aristate teeth (teeth 4 mm long) in the 2/3 or 3/4 of the blade; shiny olive green above, with long stellate multiradial hairs along midrib, and short ones on the limb; at first densely greyish floccose pubescent beneath, then the stellate trichomes detach from the blade, into kinds of squames, leaving axil tufts; 6-9 vein pairs, parallel, flat adaxially, prominent beneath; epidermis papillose or smooth; petiole 1-2.5 cm long, yellowish, densely floccose, glabrescent;

pistillate catkins 1-2 cm long, with 1 to several flowers;

acorn ovoid 1 cm long, singly or paired on a 1-2 cm long peduncle; cup half-round with pubescent scales enclosing 1/2 the nut; maturing in 1 year in September;

– A. Camus : n° 386; – Sub-genus Quercus, section Lobatae, sub-section Acutifoliae; – Threatened (IUCN Red List Category : VU). – Possible confusion with Q. meavei as both have a fulvous tomentum on twigs and petiols, but meavei has nearly glabrous, wider leaves (to 7 cm), longer teeth (2 to 8 mm), 14-19 veins pairs, and the fruit is biennial; – Ressembles Q. sartorii but can be distinguished by its floccose twigs, petiole and veins, while sartorii has twigs, petiole and veins glabrous or glabrescent;