Hazelnut tree (scientific name: Corylus heterophylla Fisch.): also known as hazelnut, one of the world's four major dry fruits (walnuts, lentils, hazelnuts, cashews). For Betulaceae hazelnut shrub or small tree, bark gray; branches dark gray, glabrous; leaves for rectangular or broadly obovate, apical concave or truncate, central with triangular cusp, the edge of the irregularly biserrate; petiole sparsely pubescent or nearly glabrous; male inflorescences solitary; bracts campanulate, densely pubescent and sparsely villous, the upper part of the shallowly lobed, the lobes are triangular, the edge of the entire; peduncle is densely pubescent. Nut subglobose, glabrous or only sparsely villous apically. Born in thickets on shady slopes in mountainous areas at 200-1000 m above sea level. Distributed in China, Turkey, Italy, Spain, the United States, Korea, Japan, eastern Siberia and the Far East of Russia, and eastern Mongolia. Hazelnut and hemp oak fruit is very similar, but the leaves do not look like note the distinction.