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The state produces 99% of the nation's filberts or hazelnuts, with the preferred name depending on who you ask. Oregon's state nut has two different names. Why is that?
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.
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 top producer of hazelnuts, by a large margin, is Turkey, specifically the Giresun Province.
Filbertone is the principal flavor compound of hazelnuts. [1] It is used in perfumery and is designated as generally recognized as safe (GRAS) for use in food products. [2] Because filbertone is found in hazelnut oil, its presence can be used to detect the adulteration of olive oil with less expensive hazelnut oil. [3] [4]
The filbert nut is edible, and is very similar to the hazelnut (cobnut). Its main use in the United States is as large filler (along with peanuts as small filler) in most containers of mixed nuts. Filberts are sometimes grown in orchards for the nuts, but much less often than the common hazel. [3] [4]
The fruit is a nut sometimes called "Turkish nuts" about 1–2 cm long, surrounded by a thick, softly spiny and bristly involucre (husk) 3 cm diameter, [1] which encloses all but the tip of the nut; the nuts are borne in tight clusters of 3–8 together, with the involucres fused at the base.
The nuts of all hazels are edible. The common hazel is the species most extensively grown for its nuts, followed in importance by the filbert. Nuts are also harvested from the other species, but apart from the filbert, none is of significant commercial importance. [5]
Corylus, the filbert tree or hazel, a genus of deciduous tree Corylus maxima, the filbert, a species of hazel; Filbert nut or hazelnut, any of the nuts deriving from species of the genus Corylus; Filbert paintbrush for artists; The Filbert (horse) (foaled in 1980), a New Zealand bred race-horse; Filbert, South Carolina, an unincorporated community