Quercus scytophylla Liebm.

Mexico (Chiapas, Guerrero, Mexico, Michoacan, Nayarit, Oaxaca, Puebla, Jalisco, Durango, Sinaloa, Sonora) ; 800-2600 m ;

6-20 m tall, trunk to 30-60 cm or more;

7-16 x 3-7 cm; deciduous or weakly persistent; oboval, elliptic, oblanceolate or lanceolate; thick, subcoriaceous; very rough; apex pointed, with aristate tooth; base acute or attenuate, sometimes oblique; margin thick, flat, cartilaginous, serrate-dentate with 3-6 pairs of teeth with 0.5-4 mm long bristled tips; greyish green above, dull, glabrous or with multiradiate and sometimes glandular trichomes near base of midrib; densely whitish tomentose beneath with 20-40 rayed sessile trichomes; 5-9 vein pairs prominent beneath, and impressed above; epidermis abaxially dull, bullate and papillose; petiole 1-4 cm long;

in February; staminate carkins 3-5 cm, loosely few-flowered; pistillate flowers pubescent, 1-2 on a short rachis 3-10 mm long;

acorn 1-1.7 cm long, 0.9 cm in diameter; solitary or paired on a 5-15 mm long peduncle; cup halfround 10-12 mm in diameter, enclosing 1/2 or 2/3 of nut; maturing in 1 year in October;

not quite hardy (?); all types of soils;

– A. Camus : n° 301; – Sub-genus Quercus, Section Lobatae, Series Erythromexicanae; – For Zavala-Chavez, 2003, Q.incarnata Trel. is a variety of Q.sideroxyla and for Suzana Valencia-A. 2004 it is a synonym of Q.sideroxyla. – Sometimes confused with Q. sideroxyla , but the foliar base of this one is obtuse, rounded to cordate, and the veins are slightly impessed above;