| Regno | Plantae |
| Sottoregno | Tracheobionta |
| Superdivisione | Spermatophyta |
| Divisione | Magnoliophyta |
| Classe | Magnoliopsida |
| Ordine | Fagales |
An order of eudicots including Fagaceae (oaks, beeches, chestnuts), Betulaceae (birches, hazels) and Juglandaceae (walnuts), comprising mostly deciduous trees of great ecological and forestry importance.