榛子，泛指桦木科榛属（Ｃｏｒｙｌｕｓ）多种灌木或小乔木所结的坚果。由于其果仁味美可食、营养丰富，又有独特的风味，被视为干果中的佳品。世界上共有２０余种榛树，分布于北半球的寒温带至亚热带。我国有榛属植物８个种及２个变种，除新疆、福建、广东、广西外，其它省区 Hazelnut, refers to the birch Corylus (Corylus) a variety of shrubs or small tree nuts. Because of its delicious edible nuts, nutritious, but also a unique flavor, is considered the best products in dried fruit. There are more than 20 species of hazel in the world, distributed in the temperate zone of the northern hemisphere to the subtropical zone. China has 8 species and 2 varieties of genus Corylus, except Xinjiang, Fujian, Guangdong, Guangxi, other provinces and autonomous regions