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Gevuina avellana, commonly known as the Chilean hazelnut (avellano chileno in Spanish) or Gevuina hazelnut, is an evergreen tree growing up to 20 meters (65 feet) tall. It is the only species currently classified in the genus Gevuina .
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.
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 name "hazelnut" applies to the nuts of any of the several species of the genus Corylus. This hazelnut or cobnut, the kernel of the seed, is edible and used raw or roasted, or ground into a paste. The seed has a thin, dark brown skin which has a bitter flavour and is sometimes removed before cooking.
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]
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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.
This will allow the seed to germinate in 1 to 6 months if kept at 20 °C. Once the seed is large enough to handle, pick the seedlings out into individual pots and grow them on in a cold frame or sheltered place outdoors for their first winter. You can plant the seed into their permanent positions in late spring or early summer. [11]