Quercus suber

Evergreen tree to c. 10 m high. Bark thick (to 5 cm or more), deeply furrowed and corky. Leaves harsh-textured, ovate, mostly 4-7 cm long, 2-3.5 cm wide, margin usually with 4-6 pairs of short acute teeth, rarely entire, the lateral veins excurrent as a short bristle or point to c. 3 mm long, upper surface dark green, finally glabrous, lower surface grey-green, densely pubescent; petiole 1-1.5 cm long. Acorns narrow-ovoid, 1.5-2.5 cm long, singly or paired on peduncles 5-10 mm long; cupule up to half as long as acorn, initially shaggy from the free tips of the scales, but finally scales barely raised. Catkins appear spring. Acorns produced mostly Mar.-May.