Page authors: Don Knoke, David Giblin
Corylus avellana
common filbert, European hazelnut

Distribution: Occurring west of the Cascades crest in Washington; British Columbia to Oregon, also known from western Idaho.

Habitat: Abandoned plantings, roadsides, waste sites, forest edge.

Flowers: January-April

Origin: Introduced from Europe

Growth Duration: Perennial

Conservation Status: Not of concern

Pollination: Wind


Monoecious, deciduous shrubs to 5 m. tall; bark coppery brown; branches ascending; twigs pubescent, covered with bristly, glandular hairs.


Petioles pubescent, covered with bristly, glandular hairs; leaf blades broadly ovate to broadly elliptic, 5-12 cm. long and 4-12 cm. wide, thin, the base cordate to rounded, the margins coarsely doubly-serrate, the tip abruptly acuminate.


Staminate catkins lateral along branchlets on short shoots, pendant, in clusters of 2-4; stamens 4; pistillate flowers beyond staminate on branchlets, often terminal, in clusters of 2-4, subtended by 2 enlarged bracts, distinct nearly to the base, concealing the flowers except for the red stigmas.


Hard-shelled nut about 1.5 cm. in diameter, nearly enclosed by the bracts

Accepted Name:
Corylus avellana L.
Publication: Sp. Pl. 2: 998. 1753.

Synonyms & Misapplications:
(none provided)
Additional Resources:

PNW Herbaria: Specimen records of Corylus avellana in the Consortium of Pacific Northwest Herbaria database

WA Flora Checklist: Corylus avellana checklist entry

OregonFlora: Corylus avellana information

E-Flora BC: Corylus avellana atlas page

CalPhotos: Corylus avellana photos

28 photographs:
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