Oaks of the World

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  Quercus striatula
Author Trel. 1924
Synonyms cordifolia Trel. 1924
Local names  
Range Mexico (Aguascalientes;Chihuahua, Durango, Zacatecas) ; 2100-3000 m ;
Growth habit 15-50 cm ;
Leaves 1-3 x 0.5-1.3 cm; subcoriaceous; elliptic, elliptic-lanceolate, oblong or oblong-lanceolate; apex rounded or acute, mucronate; base rounded or obtuse, sometimes cordate; margin revolute, sometimes flat, entire or lobed-dentate with 1-3 pairs of mucronate teeth, mostly asymmetrically; adaxially dull greyish green, with scattered trichomes, denser on the veins of the base of the blade (solitary simple and 7-14 rayed stellate trichomes); abaxially densely tomentose with solitary simple, stellate, simple glandular and bulbous glandular trichomes; 7-9 vein pairs, more or less impressed above, raised under; epidermis bullate and papillose; petiole 1-2.5 mm, tomentose at first, then glabrescent;
Flowers  
Fruits acorn 1.2-1.5 cm, ovoid, slightly striated, singled or paired, sessile or on a 1-4 mm long peduncle; enclosed 1/4 to 1/3 by cup; cup half-round, with straight margin, 8-12 mm in diameter, thin scales pubescent at base and hairless at apex; maturing the first year in September;

Bark, twigs and
buds

bark grey, furrowed; twig 0.7-1.5 mm in diameter, tomentose at first then glabrescent, with lenticels; bud subglobose 1-1.3 mm long; stipules glabrescent 1.5-3 mm.
Hardiness zone, habitat  
Miscellaneous -- Section Quercus; sub-section Microphyllae;
-- For Susana Valencia 2006, Govaerts 2007 and The Plant List 2013, Q. cordifolia is a synonym ; for other Authors (José A. Villareal & al. 2008), Q. cordifolia AND Q. microphylla are synonyms of Q. striatula.
-- For some other Authors (J.L. Sabàs Rosales 2016) Q. cordifolia is still a true species, differing from Q. striatula in having a flat margin, flat veins adaxially (or very slightly impressed), his range (Coahuila, Nuevo Leon, San Luis Potosi, Tamaulipas)
Subspecies and
varieties
 
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