Quercus fulva Liebm.

Mexico (Coahuila, Jalisco, Sinaloa, Nayarit, Durango, Chihuahua); 1800 - 2900 m;

3-10 m; trunk 0.2-0.4 m in diameter;

8-14 x 4-9 cm; deciduous; stiff, leathery; underside concave; broadly elliptic, oboval, or oblong-oboval; apex broadly rounded to subacute, aristate; base rounded or cordate; margin flat, usually entire or sometimes with 1-10 pairs of bristle-tips ; light grey-green above, slightly lustrous, glabrous except hairs at the base of midrib, with impressed veins; beneath woolly and tawny, with yellowish glandular hairs covered with a dense pubescence made of sessile, multiradiate, 10-25 rays trichomes 0.3 mm long, not easy to remove, and stipitate fasciculate hairs; veins prominent beneath, visible in spite of the hairs; when unfolding, both surfaces are tawny; epidermis bullate; 10-13 vein pairs straight or slightly curved, often slightly impressed above; petiole rusty pubescent, 1-2 cm long;

pistillate flowers 1-3 at the tip of a short, thick, tomentose peduncle;

acorn 8-12 mm; ovoid or subglobose; solitary or 2-3 together, on 1-1.5 cm long stalk; enclosed 1/2 by cup; cup shallow, 13-18 mm in diameter, with rolled under rim and pubescent scales widenned at base; maturing in 2 years;

not quite hardy;

– A. Camus : n° 303; – Sub-genus Quercus, section Lobatae, Series Erythromexicanae; – Can be confused with Q. crassifolia , but crassifolia has stalked trichomes abaxially, and numerous glandular, golden trichomes easy to remove. It may be confused as well with Q. macvaughii which has fascicled trichomes with 5-8 rays, and the rim of the acorn cup rolled inside. – Resembles as well Q. calophylla , which differs in having longer multiradiate hairs below (0,55 mm), no other type of non glandular trichomes below, the margin toothed, the rim of the acorn straight, the limb flat.