durmast oak

One of two oak species native to Britain (Quercus petraea), dominant in the north and west of Britain, and on light soils and hillsides in the south. It is distinguished from English oak by its longer petiole (8–12mm), towards which the base of the leaf tapers gradually, stalkless (sessile) acorns and straighter branches. Compared to the English oak it also has a more open crown, and lighter crops of acorns.

This definition is abridged from A – Z of tree terms: A companion to British arboriculture.
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