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Corylus Linnaeus. Subfamily: Coryloideae. Hazelnut, Filbert.

Key to Corylus

A genus of about 15-18 species, shrubs and trees, of temperate regions of the Northern Hemisphere. Eurasian species of this genus, Corylus avellana Linnaeus and C. maxima P. Miller, are the sources of commercial filberts or hazelnuts. They are sometimes cultivated in North America, especially in the Pacific Northwest. Our wild species are also excellent eating, but wild animals, especially squirrels, usually harvest them before they are ripe. Subgeneric classification follows Whitcher & Wen (2001).

Ref: Forest & Bruneau (2000); Furlow (1997) In Flora of North America Editorial Committee (1997); Govaerts & Frodin (1998); Kubitzki, Rohwer, & Bittrich (1993); Whitcher & Wen (2001); Wright et al. (2023). Show full citations.

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Hover over a shape, letter, icon, or arrow on the map for definition or see the legend. Data for arrows not developed for genera and families which may have species only occurring outside the flora area.

image of plant© Bruce A. Sorrie | Corylus americana | Original Image ⭷
image of plant© Emily Oglesby | Corylus americana | Original Image ⭷
image of plant© Bruce A. Sorrie | Corylus americana | Original Image ⭷
image of plant© Keith Bradley | Corylus americana | Original Image ⭷
image of plant© Erik Danielson | Corylus cornuta var. cornuta source | Original Image ⭷
image of plant© Erik Danielson | Corylus cornuta var. cornuta source | Original Image ⭷
image of plant© Richard & Teresa Ware | Corylus cornuta var. cornuta CC-BY-NC, permission granted to NCBG | Original Image ⭷
image of plant© Erik Danielson | Corylus cornuta var. cornuta source | Original Image ⭷

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