E-Flora BC: Electronic Atlas of the Flora of British Columbia

Corylus cornuta Marsh. var. cornuta
beaked hazelnut
Betulaceae (Birch family)

Introduction to Vascular Plants

© Virginia Skilton  Email the photographer   (Photo ID #26050)

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Distribution of Corylus cornuta var. cornuta
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Species Information

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General:
Deciduous shrub, 1-3 m tall with many stems, densely clumped or spreading by suckers; twigs sparsely to moderately hairy, sometimes glandular.
Leaves:
Alternate, deciduous, elliptic to oval, leaf blades heart-shaped with a sharp-pointed tip, doubly saw-toothed, paler below than above, 4-10 cm long, turning yellow in the fall.
Flowers:
Male flowers in catkins appearing before the leaves in spring; female flowers in a very small catkin with protruding red stigmas.
Fruits:
Edible hard-shelled nuts completely enclosed by bristly bractlets, in 2's or 3's at the end of branches, barely 1.5 cm long, thinly hairy or glabrous.
Notes:
Two varieties occur in BC:

1. Involucral beaks about twice as long as the fruit; silicles thinly short-hairy; twigs sparsely hairy............... var. cornuta

1. Involucral beaks about equal in length to the fruit; silicles glabrous; twigs hairy, sometimes glandular............... var. californica (A. DC.) Sharp

Source: The Illustrated Flora of British Columbia

Habitat / Range

Mesic sites in the lowland and montane zones; var. cornuta - common south of 57degreeN east of the Coast-Cascade Mountains, var. californica - frequent on S Vancouver Island and the lower Fraser Valley, becoming rare to the east; E to NF and S to GA (var. cornuta) and E to ID and S to CA (var. californica).

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Corylus cornuta var. cornuta

The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)

Site Information
Value / Class

Minimum

Average

Maximum

Elevation (metres) 470 470 470
Slope Gradient (%) 19 19 19
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
163 163 163
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
4 4 4
Modal Nutrient Regime
Class
D
Number of field plots
 species was recorded in:
1
Modal BEC Zone Class
IDF
All BEC Zones (# of stations/zone) species was recorded in: IDF(1)

Climate

The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Synonyms and Alternate Names

Corylus rostrata Aiton

Taxonomic and Nomenclatural Links

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General References