Oaks of the World

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 Quercus leiophylla
Author

A.DC in A.P. de Candolle 1864 Prodr. 16(2): 71
Diagnosis here

Synonyms excelsa Liebm. 1854 Diagnosis here
lancifolia Liebm. ex A.DC in A.P. de Candolle 1864, not Benth, nec Schlecht.&Cham.
lancifolia f. subintegra Trel. 1924
toxicodendrifolia Trel. 1924 Diagnosis here
Local names 
RangeMexico
Growth habitreaches 30 m, and more; trunk to more than 1 m in diameter;
Leaves 5-18 x 3-7 cm, deciduous; elliptic to lanceolate or oblanceolate (nearly 2.5 times as long as wide); leathery; plane; apex somewhat acuminate, but blunt, mucronate; base narrowed from the middle of the blade, rounded or cordate (seldom acute); young leaves reddish, with dense stellate pubescence underneath; mature leaves adaxially green and glabrous, remotely whitish pubescent along midrib abaxially; margin thick but weakly revolute, somewhat wavy, sometimes entire, often sinuate-dentate or with 8-10 pairs of sharp mucronate teeth (usually margin entire in the basal 1/3); 10-15 vein pairs slightly prominent above, strongly prominent beneath; petiole 5-10 mm long, reddish brown, hairless;
Flowers 
Fruitsacorn ovoid, elongated, 4-5 cm long; enclosed at the base only (sometimes to 1/3) by the cup; cup with appressed scales; maturing first year;

Bark, twigs and
buds

bark pale grey, fissured into thin plates; twig slender, 1.5-3 mm thick, hairless, grey brown, with lenticels in variable numbers; bud small (2-3 mm long), ovoid, pointed, pale brown; stipules 5-10 mm long, persistent around terminal bud;
Hardiness zone, habitat 
Miscellaneous-- Sub-genus Quercus, Section Quercus;
-- Q. lancifolia Benth. (nom. illeg.) = Q. affinis
-- Often considered as synonym of Q. lancifolia Schlecht. & Cham.
-- Closely related to Q. germana
-- For Susana Valencia-A., 2006, Q. toxicodendrifolia is a true species.
-- For Zavala-Chavez, 2003, Q. leiophylla is a variety of Q. galeottii.
Subspecies and
varieties
 
Pictures