Quercus pauciradiata Penas, Llamas & al.

North of Spain (Cantabriques Mounts in Leon); 900-1300 m;

to 10 m ;

7-11 x 4-7 vm; marcescent, papery ; base not auricled, margin lobate to pinnate ; light green above with stipitate fascicled hairs (stalk 8-20 µm and 2-4 rays 150-300 µm), some simple and some bulbous ones; glaucous beneath, with the same types of trichomes as adaxially but more abundant, plus some simple uniseriate, scattered hairs and simple hairs on veins ; 4-7 pairs of secondary veins; petiole 1-2 cm long, sulcate, tomentose with the same types of trichomes as on the blade, et bulbous hairs becoming rare; leaves appear 3 weeks before those of Q.pyrenaica ;

May - June ; numerous male catkins ; rare female flowers; acorn distorted, very often sterile;

mixed with Q.pyrenaica;

– Very rare, threatened species (only 3 populations, in a 5 km2 area); – Hybridizes with Q.pyrenaica (= Q.x  rotensis Penas, Llamas, Pérez Morales & Acedo 1997), and with Q.petraea (= Q.arrimatensis Penas, Llamas, Pérez Morales & Acedo) – This taxon is different from Q. pyrenaica which has leaves later, fasciculate stalks 40-60 µm, 4-8 rays 500-1000 µm long, leaves thicker and pubescent. Q. pubescen s has stipitate fascicled hairs with stalk 15 µm, rays 350 µm long; Q. petraea has stellate trichomes and sessile fasciculate ones (rays 60-120 µm) at veins axils.