Oaks of the World

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  Quercus subspathulata

Trel. 1924 Mem. Natl. Acad. Sci. 20: 56

Diagnosis here

Synonyms pallidifolia C.H.Muller 1972
Local names encino borrego; encino mixcahue;
Range Mexico (Chihuahua, Sonora, Michoacan, Jalisco) ; 900-1600 m ;
Growth habit 4-15 m tall; trunk 15-45 cm in diameter;
Leaves 6-16 x 3-12 cm; deciduous, oboval, spatulate; leathery; apex obtuse to rounded, sometimes retuse; base narrowly rounded to heart-shaped, sometimes auricled; margin thick, slightly revolute, wavy, toothed (3-8 pairs of obtuse teeth); both sides nearly glabrous; lustrous pale green above; waxy-glaucous beneath with sometimes a few glandular hairs and fewer stellate trichomes along large veins; 8-12 vein pairs remotely impressed adaxially, prominent beneath; stout, hairless petiole 3-5 mm long;
Fruits acorn 0.7-1 cm; singly or to 3 together on a peduncle variable in length; enclosed 1/3 or more by tomentose cup; maturing in 1 year;

Bark, twigs and

twigs 2-4 mm thick, hairless, grey, pruinose, with pale yellow lenticels; bud ovoid 2-3 mm long; stipules persistent on terminal bud;
Hardiness zone, habitat not hardy (zone 8-9); all types of soils;
Miscellaneous -- Sub-genus Quercus, Section Quercus, Series Leucomexicanae;
-- A.Camus : n° 198;
-- For Govaerts & Frodin (1998), Q.pallidifolia is a separate species, but not for today's Mexican Authors (Susana Valencia-Avalos, 2004).

Subspecies and