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For other uses, see Hazel (disambiguation).
Hazel
Corylus avellana 0001.JPG
common hazel (Corylus avellana)
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Rosids
Order: Fagales
Family: Betulaceae
Genus: Corylus
L.
Species

See text

The hazels (Corylus) are a genus of deciduous trees and large shrubs native to the temperate Northern Hemisphere. The genus is usually placed in the birch family Betulaceae,[1][2][3][4] though some botanists split the hazels (with the hornbeams and allied genera) into a separate family Corylaceae.[5][6] The fruit of the hazel is the hazelnut.

Hazels have simple, rounded leaves with double-serrate margins. The flowers are produced very early in spring before the leaves, and are monoecious, with single-sex catkins, the male catkins are pale yellow and 5–12 cm long, and the female ones are very small and largely concealed in the buds, with only the bright-red, 1- to 3-mm-long styles visible. The fruits are nuts 1–2.5 cm long and 1–2 cm diameter, surrounded by an involucre (husk) which partly to fully encloses the nut.[3]

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.[3]

The pollen of hazel species, which are often the cause for allergies in late winter or early spring, can be identified under magnification (600X) by their characteristic granular exines bearing three conspicuous pores.[7]

Species[edit]

Corylus has 14–18 species. The circumscription of species in eastern Asia is disputed, with WCSP and the Flora of China differing in which taxa are accepted; within this region, only those taxa accepted by both sources are listed below.[3][8][9][10] The species are grouped as follows:

Several hybrids exist, and can occur between species in different sections of the genus, e.g. Corylus × colurnoides (C. avellana × C. colurna). The oldest confirmed hazel species is Corylus johnsonii found as fossils in the Ypresian-age rocks of Ferry County, Washington.[11]

Uses[edit]

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.[4]

A number of cultivars of the common hazel and filbert are grown as ornamental plants in gardens, including forms with contorted stems (C. avellana 'Contorta', popularly known as "Harry Lauder's walking stick" from its gnarled appearance); with weeping branches (C. avellana 'Pendula'); and with purple leaves (C. maxima 'Purpurea').

Hazel is a traditional material used for making wattle, withy fencing, baskets, and the frames of coracle boats. The tree can be coppiced, and regenerating shoots allow for harvests every few years.

Hazels are used as food plants by the larvae of various species of Lepidoptera.

Mythology and folklore[edit]

The Celts believed hazelnuts gave one wisdom and inspiration. There are numerous variations on an ancient tale that nine hazel trees grew around a sacred pool, dropping into the water nuts that were eaten by salmon (a fish sacred to Druids), which absorbed the wisdom. A Druid teacher, in his bid to become omniscient, caught one of these special salmon and asked a student to cook the fish, but not to eat it. While he was cooking it, a blister formed and the pupil used his thumb to burst it, which he naturally sucked to cool, thereby absorbing the fish's wisdom. This boy was called Fionn Mac Cumhail (Fin McCool) and went on to become one of the most heroic leaders in Gaelic mythology.[12]

"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.

Gallery[edit]

Giresun Hazel Turkey

References[edit]

  1. ^ Germplasm Resources Information Network: Corylus
  2. ^ Chen, Z.-D. et al. (1999). Phylogeny and evolution of the Betulaceae as inferred from DNA sequences, morphology, and paleobotany. Amer. J. Bot. 86: 1168–1181. Available online.
  3. ^ a b c d Rushforth, K. (1999). Trees of Britain and Europe. Collins ISBN 0-00-220013-9.
  4. ^ a b Huxley, A., ed. (1992). New RHS Dictionary of Gardening. Macmillan ISBN 0-333-47494-5.
  5. ^ Bean, W. J. (1976). Trees and Shrubs Hardy in the British Isles 8th ed., vol. 1. John Murray ISBN 0-7195-1790-7.
  6. ^ Erdogan, V. & Mehlenbacher, S. A. (2002). Phylogenetic analysis of hazelnut species (Corylus, Corylacae) based on morphology and phenology. Sist. Bot. Dergisi 9: 83–100.
  7. ^ Nature 10, 355-355 (03 September 1874) | doi:10.1038/010355b0 (Letters to the Editor). Retrieved 23 February 2014.
  8. ^ WCSP: Corylus
  9. ^ Flora of China: Corylus
  10. ^ Flora of North America: Corylus
  11. ^ Pigg, K.B.; Manchester S.R. & Wehr W.C. (2003). "Corylus, Carpinus, and Palaeocarpinus (Betulaceae) from the Middle Eocene Klondike Mountain and Allenby Formations of Northwestern North America". International Journal of Plant Sciences 164 (5): 807–822. doi:10.1086/376816. 
  12. ^ Floriz: Mythology and Folklore of the Hazel Tree

External links[edit]


Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/Hazel — Please support Wikipedia.
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Los Angeles Times

Los Angeles Times
Sat, 26 Jul 2014 19:51:45 -0700

“Saga,” writer Brian K. Vaughan and artist Fiona Staples told their panel's capacity crowd Saturday at Comic-Con, is Hazel's story. The daughter of Alana and Marko – on-the-run lovers born of warring alien species – Hazel narrates Vaughan and Staples' ...

Daily Mail

Daily Mail
Thu, 24 Jul 2014 04:10:44 -0700

BBC presenter Hazel Irvine provoked fury last night after she referred to Wales as a principality during the Opening Ceremony of the Glasgow 2014 games. The Scottish broadcaster made the slip up as Team Wales entered the city's Celtic Stadium during ...

Manchester Evening News

Manchester Evening News
Sun, 27 Jul 2014 21:30:00 -0700

The Hazel Grove-based firm are world leaders in providing independent inspection, expediting services and quality assurance services (ISO9001), to operators and EPC's alike for industries such as oil and gas, petrochem, power generation, wind, mining ...
 
Sioux Falls Argus Leader
Wed, 23 Jul 2014 21:06:58 -0700

When it comes to music, it's hard for the members of Sister Hazel to agree on a single genre. “All of us like a lot of different music,” drummer Mark Trojanowski says. “But we have a vibe together.” That vibe combines elements of acoustic rock, folk ...

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Luton On Sunday
Sun, 27 Jul 2014 05:00:00 -0700

With works to improve M1 Junction 10a well advanced, and opening to the public of the final section of inner ring road due this summer, I am delighted that construction of a new purpose-built travel centre at the station interchange can start next month.
 
Stock Market Wire
Mon, 28 Jul 2014 00:18:45 -0700

StockMarketWire.com - Hazel Renewable Energy VCT 2's net asset value per ordinary share fell to 104.7p at the end of June - down from 105.2p at the end of March and 123.3p at the the end of December. Story provided by StockMarketWire.com ...

Metro

Metro
Mon, 21 Jul 2014 14:00:00 -0700

Louise Hazel believes Britain 'wasted a medal' by not taking Morgan Lake to the Commonwealth Games following the injury to Katarina Johnson-Thompson. Hazel, the reigning Commonwealth heptathlon champion, believes British Athletics should have tried ...
 
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Sun, 13 Jul 2014 05:13:13 -0700

More than 10,000 people came to Hazel Park Raceway for the inaugural night of thoroughbred racing last month — so many that the beer ran out by the fifth of that night's nine races, Adkins said. The second-weekend turnout was smaller, but still ...
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