Quercus × andegavensis Hy

France, Spain (Navarra, near Roncesvalles);

6-10 cm x 3-5; pinnatilobate; dark green above, becoming nearly hairless; below with thick tomentum at first, then glabrescent with only rare axil tufts; apex rather obtuse; base cordate or truncate, often asymmetrical; lobes ovate, obtuse, sometimes lobulate; 5-8 vein pairs, prominent below, with intercalary veins; petiole tomentose 0.5-1 cm long;

acorn on a tomentose peduncle 1-3 cm long; cup with tomentose scales ending in elongate obtuse tip;

– Actually one must distinguish Q.x rechinii , in which Q.robur is dominant = twigs glabrous; bud glabrescent, 3-5 mm; leaves 7-12 x 5-7 cm, glabrous on both sides (or sometimes some simple hairs along midrib), lobes often lobulate, 5-8 vein pairs with numerous intercalary veins; petiole glabrous or nearly so, 3-7 mm long; acorn with hairless, 2-4.5 cm peduncle; – The hybrid between Q. pyrenaica and Q. orocantabrica has a name : Q. x subandegavensis A. Camus 1935 acute lobes, foliar margin more or less pinnate, adaxially glabrescent, abaxially tomentose, petiole short and reddish. In 2022, Vila-Viçosa & al. showed that this taxon is a synonym of Q. x tavaresii. – The hybrid between Q. pyrenaica and Q. estremadurensis , named Q. x henriquesii Franco & Vasconcelos 1954 is, for Vila-Viçosa & al. 2022, a synonym of Q. welwitschii.