Deciduous shrub, 1-3 m tall with many stems, densely clumped or spreading by suckers; twigs sparsely to moderately hairy, sometimes glandular.
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.
Male flowers in catkins appearing before the leaves in spring; female flowers in a very small catkin with protruding red stigmas.
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.
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
Present from Summer to Fall
Source: The USDA
||Value / Class
Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
of field plots
species was recorded in:
BEC Zone Class
All BEC Zones (# of stations/zone) species was recorded in
|BG(1), BWBS(5), CDF(5), CWH(32), ESSF(1), ICH(564), IDF(121), MS(2), PP(7), SBPS(1), SBS(77)|
Source: Klinkenberg 2013
Synonyms and Alternate Names:
Corylus californica (A. DC.) Rose
Corylus cornuta subsp. californica (A. DC.) E. Murray
Corylus cornuta var. glandulosa B. Boivin
Taxonomic Key to Corylus
1. Twigs sparsely to moderately hairy, sometimes slightly glandular; silicles completely enclosed by bristly bractlets.....................C. cornuta
1. Twigs both hairy and glandular, silicles not completely enclosed by the thinly downy, lacerated bractlets.................................C. avellana