Oaks of the World

-- A. Camus : n° 166 ;
-- Sub-genus Quercus, Section Quercus, Series Roburoid.

-- For Menitsky (1971), this taxon is actually a race of Q.robur, strongly heterogenous, characters of which are result of both an adaptation to drought climate, and a probable introgression with other species (Q.pubescens and Q.petraea in North of its range, and Q.infectoria in the South).
It differs from Q.robur in having leaves undersides and cup scales hairy, leaves wider with larger, more dentate  lobes, acorn cup broader;

-- For A.Camus, Q.longipes Stev. has petiole twice longer and deserves varietal rank (if not a specific one);

-- Q.erucifolia Steven 1857 (= erucaefolia)
is sometimes considered as a true species; buds 5 mm long ; leaves oboval with rounded apex and slightly cordate, not auricled base; 6-7 x 4-6 cm; minutely tomentose or glabrescent beneath; 6-8 elongated lobes, usually lobulated; tertiary veins present; petiole 0,5-1 cm long; peduncle 2-4 cm long, bearing a small acorn; cup scales flat, with appressed tips.
It is different from Q.longipes by having thinner leaves, peduncle twice shorter, cup with smaller scales not regularly arranged.

-- Q.haas Kotschy 1862
for A. Camus, is " very distinct from Q.pedunculiflora, whose it has been often confused with, by young twigs and peduncles densely tomentose, and cup scales more appressed. It differs from Q.brutia in having leaves tomentose beneath, peduncles and acorns much more elongated, scales more appressed ".
see Q.robur.