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The beaked hazelnut is named for its fruit, which is a nut enclosed in a husk with a tubular extension 2–4 cm (3 ⁄ 4 – 1 + 1 ⁄ 2 in) long that resembles a beak. Tiny filaments protrude from the husk and may stick into, and irritate, skin that contacts them.
The fruit is a dark red nut when young and turns black. [1] The peel is woody. [1] It can grow up straight or branched from the soil, making up either a tree or a shrub. [1] The name Gevuina comes from guevin, the Mapuche Indigenous name for the Chilean hazel. [3]
The fruits are nuts 1–2.5 cm (1 ⁄ 2 –1 in) long and 1–2 cm diameter, surrounded by an involucre (husk) which partly to fully encloses the nut. [4] The shape and structure of the involucre, and also the growth habit (whether a tree or a suckering shrub), are important in the identification of the different species of hazel. [4]
Cracked hazelnut shell displaying the edible seed Hazelnut tree, Turkey. A hazelnut cob is roughly spherical to oval, about 15–25 millimetres (5 ⁄ 8 –1 inch) long and 10–15 mm (3 ⁄ 8 – 5 ⁄ 8 in) in diameter, with an outer fibrous husk surrounding a smooth shell, while a filbert is more elongated, being about twice as long as its diameter.
The definition of fruit for this list is a culinary fruit, defined as "Any edible and palatable part of a plant that resembles fruit, even if it does not develop from a floral ovary; also used in a technically imprecise sense for some sweet or semi-sweet vegetables, some of which may resemble a true fruit or are used in cookery as if they were ...
The species is mainly cultivated for its nuts. The name 'hazelnut' applies to the nuts of any species in the genus Corylus, but in commercial contexts usually describes C. avellana. This hazelnut or cob nut, the kernel of the seed, is edible and used raw, roasted, or ground into a
Corylus jacquemontii (Jacquemont's hazelnut or Indian tree hazel) is a species of hazel, found in Asia, within the Himalayas and from Afghanistan through to W. Nepal.It is a small tree or shrub, with grey bark, ovate or obovate (teardrop-shaped) leaves, small flowers and small edible nuts, grouped in small clusters.
The American hazelnut grows to a height of roughly 2.5 to 5 m (8 to 16 ft), [6] with a crown spread of 3 to 4.5 m (10 to 15 ft). It is a medium to large shrub, which under some conditions can take the like of a small tree. It is often multi-stemmed with long outward growing branches that form a dense spreading or spherical shape.