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The flowers bloom in early spring before the leaves, and are unisexual, with single-sex catkins; the male pale yellow and 5–10 cm long, the female very small and largely concealed in the buds, with only the bright red 1–3 mm long styles visible. The flowers on female trees are not very visible. On male trees, however, the flowers are visible.
"The Hazel Branch" from Grimms' Fairy Tales claims that hazel branches offer the greatest protection from snakes and other things that creep on the earth. In the Grimm tale "Cinderella", a hazel branch is planted by the protagonist at her mother's grave and grows into a tree that is the site where the girl's wishes are granted by birds. [19]
Corylus americana, the American hazelnut [3] or American hazel, [4] is a species of deciduous shrub in the genus Corylus, native to the eastern and central United States and extreme southern parts of eastern and central Canada.
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 leaves are rounded, 5–12 cm (2– 4 + 3 ⁄ 4 in) long by 4–10 cm (1 + 1 ⁄ 2 –4 in) broad, with a coarsely double-serrated margin. The flowers are wind-pollinated catkins produced in late winter; the male ( pollen ) catkins are pale yellow, 5–10 cm (2–4 in) long, while the female catkins are bright red and only 1–3 mm ( 1 ...
It is a deciduous shrub or small tree growing to 7 m (23 ft) tall, with stems up to 20 cm (8 in) thick grey bark.The leaves are rounded, 4–13 cm (1 + 1 ⁄ 2 –5 in) long and 2.5–10 cm (1–4 in) broad, with a coarsely double-serrated to somewhat lobed margin and an often truncated apex.
The beaked hazel is the hardiest of all hazel species, surviving temperatures of −50 °C (−58 °F) at its northern limits. [ 5 ] It has a shallow and dense root system which is typically only 15 cm (6 in) deep, with a single taproot which may extend 0.6 m (2 ft) below the surface.
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.