Quercus mohriana Buckley ex Rydb.

W Oklahoma, Texas, New Mexico; North of Mexico (Coahuila and possibly Nuevo León); to 2500 m;

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

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;

male inflorescence slightly hairy, 2-3 cm long; female inflorescence 0.2-0.8 cm long, bearing 1-3 flowers;

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;

– 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.