Oaks of the World

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  Quercus scytophylla

Liebm. 1854 Overs. Kongel. Danske Vidensk. Selsk. Forh. Medlemmers Arbeider 1854: 180

Diagnosis here

Synonyms campanariensis Trel.1924 Diagnosis here
epileuca Trel. 1924 Diagnosis here
incarnata Trel. 1924 Diagnosis here
Local names Encino 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 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;
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 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;

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, 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;

Subspecies and