Oaks of the World

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  Quercus cordifolia
Author Trel. 1924 Mem. Natl. Acad. Sci. 20: 84
Diagnosis here
Synonyms Q. striatula Trel. 1924 Diagnosis here (actually, for S. Valencia-A. 2006, and for Govaerts 2007 as well, it is the name to be given to this taxon, Q. cordifolia being a mere synonym.
Local names  
Range Mexico ( Coahuila, Nuevo Leon, San Luis Potosi, Zacatecas); ca 2300 m;
Growth habit less than 3 m; bushy; rhizomatous;
Leaves 2-4 x 0.7-1.5 cm; deciduous or semi-evergreen ; oblong to oval or lanceolate; flat; apex obtuse or remotely acute mucronate; base cordate, sometimes obtuse; margin thick, not revolute, entire or seldom with 1-2 pairs of mucronate teeth, often both sides asymmetrical, sometimes slightly undulate; shiny green above, with thin pubescence made of sessil trichomes; whitish and densely tomentose beneath; 6-9 vein pairs, slightly curved; epidermis slightly bullate; petiole slender (1 mm thick), pubescent, 1.5-3 cm long;
Flowers male catkins 0.5-2 cm long, few flowered; April-May;
Fruits acorn 1 cm long, ovoid, mucronate, dark brown to blackish; solitary or paired; 1/3 or 1/4 enclosed by cup; subsessile or short peduncle 1-2 cm long; cup with scales tomentose; ripen first year in July-September;

Bark, twigs and

bark rough, grey; twig slender, tomentose during 1 or 2 years, becoming glabrescent and reddish, with minute lenticels; bud globose, very small (1-1.5 mm), dark red; stipules 1-5 mm long, deciduous, subulate, pubescent at base;
Hardiness zone, habitat not quite hardy;
Miscellaneous -- A. Camus : n° 253 ;
-- Sub-genus Quercus, Section Quercus ;
-- For some Authors (José A. Villareal & al. 2008) it a species whose name is Q. striatula, having , in addition to Q. cordifolia, an other synonym : Q. microphylla.
Subspecies and