Biology:Corylus maxima
| Filbert | |
|---|---|
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| Filbert fruit, showing the elongated tubular involucre | |
Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Fagales |
| Family: | Betulaceae |
| Genus: | Corylus |
| Species: | C. maxima
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| Binomial name | |
| Corylus maxima Mill.
| |
| Synonyms[2] | |
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Corylus maxima, the filbert, is a species of hazel in the birch family. It is native to Eurasia and produces an edible nut.
Description
It is a deciduous shrub 6–10 metres (20–33 feet) tall, with stems up to 20 centimetres (8 inches) thick. 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 (1⁄16–1⁄8 in) long. The fruit is a nut produced in clusters of 1–5 together. Each nut is 1.5–2.5 cm (1⁄2–1 in) long, fully enclosed in a 3–5 cm (1 1⁄4–2 in) long, tubular involucre (husk).[3][4]
Similar species
The filbert is similar to the related common hazel, C. avellana, differing in having the nut more fully enclosed by the tubular involucre. This feature is shared by the beaked hazel C. cornuta of North America, and the Asian beaked hazel C. sieboldiana of eastern Asia.[5]
Distribution and habitat
The species is native to southeastern Europe and southwestern Asia, from the Balkans to Turkey.[3]
Uses
The purple-leaved cultivar C. maxima 'Purpurea' is a popular ornamental shrub in gardens.[6]
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]
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C. maxima 'Purpurea'
Name
In Oregon, "filbert" was used for commercial hazelnuts in general. Use in this manner has faded partly due to the efforts of Oregon's hazelnut growers to brand their product to better appeal to global markets and avoid confusion.[7][8]
References
- ↑ Rivers, M.C.; Beech, E. (2018). "Corylus maxima". IUCN Red List of Threatened Species 2018. doi:10.2305/IUCN.UK.2018-2.RLTS.T194619A122039374.en. https://www.iucnredlist.org/species/194619/122039374. Retrieved 31 July 2023.
- ↑ "Corylus maxima Mill.". Board of Trustees of the Royal Botanic Gardens, Kew. 2017. https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:295467-1.
- ↑ 3.0 3.1 3.2 Rushforth, Keith D. (1999). Collins Wildlife Trust guide Trees: a photographic guide to the trees of Britain and Europe. London: HarperCollins. pp. 622–623. ISBN 0-00-220013-9.
- ↑ 4.0 4.1 Flora of NW Europe: Corylus maxima
- ↑ New Royal Horticultural Society Dictionary of Gardening. 1. London : New York: Macmillan Press. 1992. pp. 733, 735. ISBN 1-56159-001-0.
- ↑ "RHS Plant Selector - Corylus maxima 'Purpurea'". http://apps.rhs.org.uk/plantselector/plant?plantid=555.
- ↑ Oregon Hazelnut Marketing Board
- ↑ "Agriculture Quarterly - Oregon Department of Agriculture". http://www.oda.state.or.us/information/AQ/AQFall99/07.html.
External links
Wikidata ☰ Q1801446 entry
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