Oaks of the World

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  Quercus saltillensis

Trel. 1924 Mem. Natl. Acad. Sci. 20: 183

Diagnosis here

Synonyms carnerosana Trel. 1924
sierramadrensis C.H.Mull. 1942
tenuiloba f. gracilis C.H.Mull. 1936
Local names
Range Mexico (Coahuila, Nuevo Leon, Tamaulipas, Zacatecas) ; 1900-2700 m;
Growth habit usually 1-5 m; often less than 3 metres tall, seldom to 12 m;
Leaves 2-5 cm long, 1-1.8 wide; slowly deciduous; subcoriaceous, thin, flexible, not held verticaly nor appressed to twig; lanceolate, elliptic or oblong, seldom oblanceolate; apex acute, bristle-tipped, seldom rounded; base rounded or heart-shaped; margin slightly revolute or flat, entire or with 1 or 2 bristle-tipped teeth near apex; lustrous dark green, somtimes with stellate hairs, glabrescent above; paler beneath, glabrescent, with a whitish, scratchable tomentum made of stellate trichomes, becoming rarer in summer (only at axils); 5-12 vein pairs, flat adaxially and slightly raised abaxially; epidermis smooth; petiole 2.5-8 mm long, glabrous or with the same tomentum as on the twigs; 
Flowers male inflorescence 4-5 cm; female inflorescence 5-15 mm bearing 1-2 flowers;
Fruits acorn oblong, 0.5-1.5 cm long, singly or to 3, sessile or on a short stalk less than 0.5 cm; cup not rolled at rim, with flat, appressed, hairy scales, 1 cm in diameter, enclosing 1/2 of the nut; maturing in 1 year in September;  

Bark, twigs and

bark furrowed, dark; twig slender, 1.5-2.5 mm, with a stellate, greyish, 2 years persistent pubescence; bud ovoid or conical, brownish 1.5-2.5 mm long, with ciliate scales; stipules deciduous; inconspicuous lenticels;
Hardiness zone, habitat probably hardy, at least in zone 8; withstands -13°C;
Miscellaneous -- A. Camus : n° 370;
-- Sub-genus Quercus, section Lobatae, Series Erythromexicanae, Group Saltillenses;

Subspecies and

Exsiccata carnerosana