Corylus heterophylla Fisch. ex Trautv. - Heterophyllous hazel, Asian hazel.

Taxonomic position.

Family Betulaceae S.F. Gray, genus Corylus L.

Morphology and biology.

Shrub up to 3 m tall and more. Young branches pubescent. Leaves 6-8 cm long and 5-7 cm wide, obovate, cordate at the base, truncate at the apex, nearly trilobate, with a point not exceeding broad lateral lobes, unequally dentate at margin, glabrous above, pubescent along veins beneath. Petioles up to 3 cm long, pubescent. Fruits 2-3 together on branch ends on long, up to 3 cm, peduncle. Fruit involucre two-leaved, pubescent, completely embracing the nut. Involucral leaves incised to 1/3-1/6 of their length into subequal triangular lobes. There are petiolate glandules at the base of the leaves. Nut 12-15 mm diameter, oval, distally compressed, edible. Flowers in April, fruits in August. Anemophile. Zoochore, ornithochore. 2n=28.


General distribution: Japan, Korea, Central and Northeastern China. In the former USSR: East Siberia, Far East.


Forms dense thickets on mountain slopes, most often in the underwood of dry oak forests.

Use and economic value.

Food nut tree.


Sokolov SI., Svjaseva OA., Kubli VA. 1977. Ranges of trees and shrubs of the USSR. V.1. Leningrad: Nauka. P.111. (In Russian).
Kharkevich SS., ed. 1996. Vascular plants of the Soviet Far East. V.8. Leningrad: Nauka, P. 12-13. (In Russian).
Flora of Siberia. V.5. 1992. Novosibirsk. P.59-60.
Shishkin BK., ed. 1936. Flora URSS. V.5. Moscow; Leningrad. P.265-266. (In Russian).

© Smekalova T.N.

© Ushakova R.S.

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