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Corylus avellana, the common hazel, is a species of flowering plant in the birch family Betulaceae. The shrubs usually grow 3–8 metres (10–26 feet) tall. The nut is round, in contrast to the longer filbert nut. Common hazel is native to Europe and Western Asia. The species is mainly cultivated for its nuts.
The hazelnut is the fruit of the hazel tree and therefore includes any of the nuts deriving from species of the genus Corylus, especially the nuts of the species Corylus avellana. [1] They are also known as cobnuts or filberts according to species. Hazelnuts are used as a snack food, in baking and desserts, and in breakfast cereals such as muesli.
Corylus americana – American hazel, eastern North America; Corylus avellana – Common hazel, Europe and western Asia; Corylus heterophylla – Asian hazel, Asia; Corylus yunnanensis – Yunnan hazel, central and southern China; Involucre long, twice the length of the nut or more, forming a 'beak' Corylus colchica – Colchican filbert, Caucasus
Corylus, commonly known as the hazels, is often considered a sister group to the Ostryopsis-Carpinus-Ostrya subclade.Corylus is placed as the sister group to the remaining Coryloideae because it shares plesiomorphic character states with the Betuloideae such as bisexual inflorescences, staminate flowers with a perianth, a haploid chromosome number of 14, and nonoperculate pollen apertures with ...
They feed on leaves of the host plant, [4] the hazel (Corylus avellana), hence the Latin name coryli of the species, meaning hazelnut. Only in exceptional cases other deciduous trees, such as alder ( Alnus species), birch ( Betula species), common hornbeam ( Carpinus betulus ), [ 2 ] common beech ( Fagus sylvatica ) and hop-hornbeam ( Ostrya ...
Corylus americana is cultivated as an ornamental plant for native plant gardens, and in wildlife gardens to attract and keep fauna in an area. There are cultivated hybrids of Corylus americana with Corylus avellana which aim to combine the larger nuts of the latter with the former's resistance to a North American fungus Cryptosporella anomala. [12]
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Corylus cornuta, the beaked hazelnut (or just beaked hazel), is a deciduous shrubby hazel with two subspecies found throughout most of North America. Description