Oaks of the World

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 Quercus scytophylla
AuthorLiebm. 1854
Synonymscampanariensis Trel.1924
epileuca Trel. 1924
incarnata Trel. 1924
Local namesEncino amarillo
Range Mexico (Chiapas, Guerrero, Mexico, Michoacan, Nayarit, Oaxaca, Puebla, Jalisco, Durango, Sinaloa, Sonora) ; 800-2600 m ;
Growth habit 6-20 m tall, trunk to 30-60 cm or more;
Leaves 6-12 x 3-6 cm; deciduous or weakly persistent; oboval or oblong-oboval; thick, subcoriaceous; very rough; apex pointed, with aristate tooth; base acute or attenuate, sometimes oblique; margin thick, flat, cartilaginous, serrate-dentate with 3-5 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 trichomes and golden glandular hairs; 8-10 vein pairs prominent beneath, and impressed above; epidermis bullate and papillose; petiole 1-1.7 cm long;
Flowers in February; staminate carkins 3-5 cm, loosely few-flowered; pistillate flowers pubescent, 1-2 on a short rachis 3-10 mm long;
Fruits acorn 1-1.7 cm long, 0.9 cm in diameter; solitary or paired on a 2-5 mm long peduncle; cup halfround 10-12 mm in diameter, enclosing 1/4 or 1/3 of nut; maturing in 2 years in October;

Bark, twigs and

bark scaly; twigs 1.5-2.5 mm thick, dark brown, becoming glabrous, with numerous inconspicuous lenticels; buds obtuse, ovoid, 2-3 mm long; stipules 5 mm long, pubescent, deciduous;
Hardiness zone, habitat not quite hardy (?); all types of soils;

-- A. Camus : n° 301;
-- Sub-genus Quercus, section Lobatae;
-- 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;

Subspecies and