Oaks of the World

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  Quercus mohriana
Author Buckl. 1901 Bull. New York Bot. Gard. 2: 219 pl. 31
Local names Mohr's shin oak ;
Range W Oklahoma, Texas, New Mexico; North of Mexico (Coahuila and possibly Nuevo León); to 2500 m;
Growth habit

to 1.5 m tall; often rhizomatous, bushy, very low; thicket forming;

Leaves 2-5 x 1-2 cm ; sometimes evergreen; leathery; elliptic-oblong to elliptic-lanceolate; leathery; apex round or obtuse, rarely acute, sometimes mucronate; base rounded, sometimes subcordate; margin entire or with 1-3 pairs of mucronate teeth, asymmetrically arranged and in different numbers on each side; lustrous olive green above, with small, sparce, stellate hairs; pale dull grey, densely tomentose beneath, with simple, not glandular trichomes, stellate trichomes with undulate rays, as well with glandular uniseriate trichomes; midrib and veins (8-9 pairs) flat above and prominent abaxially; petiole pubescent, 3-6 mm long;
Flowers male inflorescence slightly hairy, 2-3 cm long; female inflorescence 0.2-0.8 cm long, bearing 1-3 flowers;
Fruits acorn oblong or elliptical 1-1.4 cm long, glabrous or puberulent at apex; singly or paired on tomentose, short peduncle (to 3 mm); enclosed 1/3 in the halfround cup; cup with straight rim, cupscales triangular to rhomboid, thin, pubescent, obtuse at apex; maturing in 1 year; cotyledons connate;

Bark, twigs and

bark grey, thin, sulcate; twigs 1-2 mm in diameter, pubescent, greyish; buds dark brown, ovoid or rounded, hairless, 1-2 mm long; stipules deciduous, pubescent, 3 mm long;
Hardiness zone, habitat hardy in zone 7; prefers calcareous soils;
Miscellaneous -- A. Camus : n° 187 ;
-- Sub-genus Quercus, Section Quercus, Series Polymorphae;
-- Hybridizes with Q. grisea and Q. havardii; these hybrids have not been named;
-- Possible confusion with Q. cordifolia, but this species has a cordate foliar base and thickenned cupscales.

Subspecies and