Oaks of the World

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  Quercus substenocarpa

Trel. 1924 Mem. Natl. Acad. Sci. 20: 52

Diagnosis here

Local names
Range Mexico in the Sierra Madre Oriental (San Luis Potosi) ;
Growth habit more than 3 metres tall;
Leaves 16-20 x 6-7 cm; deciduous; oboval; apex attenuate, sometimes retuse, mucronate; base rounded or narrowly cordate; hairless above; dull, soon glabrous, glaucous beneath; margin entire or crenate-dentate near apex; 12-12 pairs of lateral veins slightly raised above, prominent beneath; petiole hairless 2-3 mm long;
Fruits acorn 4 cm long, 2 cm in diameter, oblong, sub-elliptic; solidary at the end of a 2-3 cm long, glabrous peduncle; enclosed 1/3 by scaly cup 2.5-3 cm in diameter; cup with appressed, tomentose scales ; maturing first year; cotyledons entirely connate;

Bark, twigs and

twig 4 mm thick, sulcate, hairless, with prominent lenticels; bud ovoid 4 mm long, puberulent; persistent stipules;
Hardiness zone, habitat not hardy;
Miscellaneous -- A. Camus : tome 2, p. 534, n 195;
-- Sub-genus Quercus, Section Quercus, Series Leucomexicanae;
-- For today's Mexican Authors (Susana Valencia-Avalos, 2004) it is a synonym of Q.germana.

Subspecies and