Genus
Corylus (Hazels)
Corylus cornuta californica. Photo: (c) Harsi Parker, some rights reserved (CC BY-NC)
The hazel (Corylus) is a genus of deciduous trees and large shrubs native to the temperate Northern Hemisphere. The genus is usually placed in the birch family Betulaceae, though some botanists split the hazels (with the hornbeams and allied genera) into a separate family Corylaceae. The fruit of the hazel is the hazelnut.
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