"largely obovate-oblong or elliptic or oval-elliptic or oblong-oblanceolate.".    From Wordnik.com.  [CreationWiki - Recent changes [en]] Reference

Thorns numerous, straight, long (2-4 inches), slender; leaves thick, smooth, dark green, shining on the upper surface, pale beneath, turning dark orange red in autumn; outline obovate-oblanceolate, serrate above, entire or nearly so near base; apex acute or rounded; base decidedly wedge-shaped shaped; leafstalks short.    From Wordnik.com.  [Handbook of the Trees of New England] Reference

Leaves simple, irregularly alternate, often apparently whorled when clustered at the ends of the shoots, 2-5 inches long, one-half as wide; at first bright green beneath, dullish-green above, becoming dark glossy green above, paler beneath, obovate or oblanceolate to oval; entire, few or obscurely toothed, or wavy-margined above the center; apex more or less abruptly acute; base acutish; firm, smooth, finely sub-veined; stem short, flat, grooved, minutely ciliate, at least when young; stipules none.    From Wordnik.com.  [Handbook of the Trees of New England] Reference

"Leaves elliptical or on vigorous shoots mostly semiorbicular, acute or acuminate, divided above the middle into numerous acute coarsely glandular-serrate lobes, cuneate and finely glandular-serrate below the middle and often quite entire toward the base, with slender midribs and remote primary veins arcuate and running to the points of the lobes, at the flowering time membranaceous, coated on the upper surface and along the upper surface of the midribs and veins with short soft white hairs, at maturity thick, coriaceous, dark green and lustrous on the upper surface, paler on the lower surface, glabrous or nearly so, 1-1/2-2 inches long and 1-1-1/2 inches wide, with slender glandular petioles 3/4-1 inch long, slightly grooved on the upper surface, often dark red toward the base, and like the young branchlets villous with pale soft hairs; stipules lanceolate to oblanceolate, conspicuously glandular-serrate with dark red glands, 1/2-3/4 inch long.    From Wordnik.com.  [Handbook of the Trees of New England] Reference