Quercus × cerrioides Willk. & Costa

north-east Spain ;

medium size tree;

4-10 x 4-6 cm; oval; semi-evergreen; ± leathery; at first both sides tomentose, becoming glabrous and lustrous green above; ± tomentose and dull green waxy beneath with large axillary tufts; apex obtuse, base truncate or slightly cuneate; margin slightly wavy, with regular, broadly triangular lobes, sometimes pointed but usually obtuse with mucro giving a pointed shape; broad sinuses; (5-)6-8 evident vein pairs; tertiary veins slender, inconspicuous; petiole pinkish, slightly hairy, 0.5-1.6 cm long;

acorn 2.5 cm, oval, sessile or on short, tomentose peduncle 4-5 mm long; apex depressed or truncate; stylopodium silky, stigmas free and divergent at their base; basal scare flat, broad; groups of 2-5; cup semiglobose with  appressed, oval, tomentose scales ending in short, pinkish point; the basal scales are somewhat gibbose;

• For A. Camus it is a variety of Q.pubescens ; - For O. Schwarz, it is a subspecies of Q.faginea ; - For Govaerts & Frodin, and for today’s Spanish Authors (Rivas-Martinez, Saenz, Vázquez) it is a hybrid between Q.canariensis and Q.pubescens subsp. subpyrenaica; - For many other European Authors, it is a hybrid between Q.pubescens and Q.faginea , which is more matching with the morphological characters and with the opinion of Camus and Schwarz;