Quercus dentata Thunb.
Quercus dentata, commonly known as daimio oak, Japanese Emperor oak, is a tree with ovate to orbicular fruits.
Quercus dentata was described by Carl Peter Thunberg in 1784. The name is considered as validly published.
Quercus dentata is a species in the genus Quercus which contains approximately 641 to 798 species and belongs to the family of the Fagaceae (Beech Family). The type species of the genus is Quercus robur.
The trees have a rounded to broadly spreading canopy and reach heights of 10 to 25 metres.
Wood and Bark
Quercus dentata is deciduous. The green, simple leaves are alternate. They are obovate, sinuate and petiolate.
Flowers and Fruits
Quercus dentata produces flowers that are arranged in spikes from April to May.
The trees carry brown nuts.
Quercus dentata is native to Japan, Korea, North China and West China.
The trees prefer a sunny to half-shady situation on fresh to moist soil. The substrate should be comparatively rich with a pH between 4 and 6. The plants prefer sandy-loamy, gritty-loamy or sandy clay soil. They tolerate temperatures down to -29Â°C (USDA zone 5).
Suited as avenue tree and as specimen plant.
Maintenance and Propagation
- Remove crossing shoots late in winter or in early spring to promote healthy growth.
Propagate by sowing seed in a cold frame when seeds are ripe or by grafting.
Pests and Diseases
Honeydew, galls and distorted leaves are a sign for an infestation with aphids. Use an insecticide or control biologically , e.g. with parasitic wasps or predators such as Aphidoletes aphidimyza.
A powdery white coat on the plants indicates an infection with powdery mildew. Remove affected plants and apply a fungicide. To prevent infection improve ventilation, keep the roots moist and do not water the plants from above.
Stunted growth, fungal fruiting bodies in autumn and dieback of the plants indicate an infection with honey fungus. Remove affected plants including roots.
- Walter Erhardt, Erich GÃ¶tz, Nils BÃ¶deker, Siegmund Seybold: Der groÃe Zander. Eugen Ulmer KG, Stuttgart 2008, ISBN 978-3-8001-5406-7. (Ger.)
- Christoper Brickell (Editor-in-chief): RHS A-Z Encyclopedia of Garden Plants. Third edition. Dorling Kindersley, London 2003, ISBN 0-7513-3738-2.