Oaks of the World

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  Quercus hintoniorum
Author K.C.Nixon & C.H.Muller 1993 Brittonia 45: 147
Local names
Range Mexico(Coahuila, Nuevo Leon) ; 2600-3300 m;
Growth habit rhizomatous shrub ; may exceed 4m tall;
Leaves 4-8 cm long, 2-4 cm wide; sub-evergreen; thick, leathery; obovate to broadly elliptic; apex dentate-rounded or sub-acute; base cordate, seldom cuneate; margin more or less rolled under along sinuses, with 2-5 pairs of bristle-tipped teeth; adaxially dark green, sparcely corvered with fasciate hairs, glabrescent; pubescent beneath with fascicled and glandular hairs (becoming scattered with age), glandular hairs, very small, are on the whole underside of the blade, fascicled ones in rusty tufts only along secondary veins; 4-6 pairs of secondary veins, impressed adaxially ; underside somewhat papillose; petiole glabrous, reddish, 3-6 mm long;
Flowers staminate inflorescence 5-6 cm long; pistillate inflorescences 1 or 2-flowered on tomentose peduncles 2-7 mm long;
Fruits acorn 0.6-1.5 cm; ovoid; sessile or nearly so; singly or paired, cup with flar, appressed, rusty tomentose scales, enclosing 1/4 or 1/3 of nut; maturing in 2 years;

Bark, twigs and

bark dark grey, smooth; twig 1-2 mm in diameter, reddish brown, becoming glabrous; bud narrowly ovoid, dark brown, rusty puberulent at apex, with scales glabrous and rusty ciliate at margins; linear stipules, 5 mm long;
Hardiness zone, habitat hardiness zone : 7;
Miscellaneous -- Sub-genus Quercus, section Lobatae, Series Erythromexicanae;
-- Threatened (IUCN Red List Category : VU).

-- Related to Q.hypoxantha with which it forms the "Quercus hypoxantha complex", in association with Q.coahuilensis and Q.miquihuanensis ; similar to Q.hypoxantha, but differs in the type and distribution of leaf and twig pubescence, habit, and geographic distribution;

Subspecies and