The Fagales are an order of flowering plants, including some of the best known trees. The order name is derived from genus Fagus, beeches. The families and genera currently included are as follows:
- Betulaceae - birch family (Betula, Alnus, Carpinus, Corylus, Ostrya, Ostryopsis)
- Casuarinaceae - she-oak family (Casuarina, Gymnostoma, Ceuthostoma, Allocasuarina)
- Fagaceae - beech family (Fagus, Quercus, Castanea, Castanopsis, Chrysolepis, Formanodendron, Lithocarpus, Trigonobalanus, Colombobalanus)
- Juglandaceae - walnut family (Juglans, Pterocarya, Carya, Cyclocarya, Alfaroa, Engelhardia, Oreomunnea, * * Platycarya, Rhoiptelea)
- Myricaceae - bayberry family (Myrica, Canacomyrica, Comptonia)
- Nothofagaceae - southern beech family (Nothofagus - subgenera Fuscospora, Brassospora and Lophozonia)
- Ticodendraceae - ticodendron family (Ticodendron)
