Quercus peninsularis Trel.

Baja California in Mexico (Sierra Juarez ), to 3000 m ;

4-10 m tall, but often smaller (1-4 m);

5-8 cm; lanceolate, flat; leathery; pointed, base rounded or truncate; margin entire with 2-5 pairs of teeth; shiny green above, with some yellowish, large, stellate hairs; tufts of dense hairs beneath, at leaf axils; petiole 5-10 mm, hairy;

staminate flowers on hairy, 3 cm long catkins;

acorn 1.5 cm, ovoid; pointed; stalkless; cup scaly, pale brown, hairy inside and outside, enclosing 1/3 of nut; maturing in 1 year;

hardy in zone 7-8; valleys in mountains, canyons;

– Sub-genus Quercus, section Lobatae, Series Erythromexicanae; – Resembles Q.cedrosensis (which has smaller leaves), Q.chrysolepis (which has smaller, bicoloured leaves, greater acorns) and Q.agrifolia (which has dark green convex leaves, tomentose beneath);