birch family of flowering plants, usually placed in the order Fagales; some authorities, however, have placed the family in the order Betulales. The family contains six genera and 120-150 species. It can be divided into two subfamilies: Betuloideae, with the genera Betula (birch) and Alnus (alder); and Coryloideae, with the genera Carpinus (hornbeam), Corylus (hazel, or filbert), Ostrya, and Ostryopsis.
Learn more about birch family with a free trial on Britannica.com.
|an extraordinary or unusual thing, person, or event; an exceptional example or instance.|
|a fool or simpleton; ninny.|