Report from the Oak ICRA checklist
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Full Name: - Quercus robur 'Tortuosa'

Quercus robur 'Tortuosa' Schwerin Mitt. Dtsch. Dendrol. Ges., 28: 167 (1919) as "Quercus pedunculata tortuosa" Cultivar name has been accepted as Registered
Infrageneric Classification
Subgenus Quercus, Section Quercus
Illustration of Leaves
Image from a plant at Arboretum Kalmthout (Belgium) ©Jan De Langhe, Ghent University Botanical Garden, 2010
Main Horticultural References
(Krüssmann) Manual of Cultivated Broad-leaved Trees & Shrubs (in English) vol. 3 (1986) page 106