Betulaceae, the birch family, includes six genera of deciduous nut-bearing trees and shrubs, including the birches, alders, hazels, hornbeams, hazel-hornbeam, and hop-hornbeams, numbering a total of 1

Palaeocarpinus is an extinct genus of plants placed in the Betulaceae subfamily Coryloideae. The genus had a wide spread circumboreal distribution, with species found in North America, Europe, and Asi