Subfamily Corylaceae is a botanical term that refers to a group of flowering plants belonging to the larger family of Betulaceae. These plants are characterized by their woody stems, alternate leaves, and small inconspicuous flowers. Some of the synonyms used for this subfamily include the hazelnut family and the birch family. The subfamily Corylaceae includes several well-known and important plants such as hazelnuts, beaked hazels, filberts, and hornbeams. These plants are commonly found in temperate regions of the northern hemisphere and are often cultivated for their edible nuts or ornamental value. The use of botanical synonyms is important in ensuring clarity and consistency in scientific communication among researchers, scholars, and practitioners in the field of botany.