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Where does Fagales fit within the flowering-plant classification system?

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Fagales European beech (*Fagus sylvatica*).

In the modern Angiosperm Phylogeny Group II (APG II) botanical classification system, the order Fagales is placed within the Rosid I group among the core eudicots.1

Historically, Fagales and several unrelated families were grouped into an artificial category known as Amentiferae, based on the presence of catkins (aments) and a shared trend toward wind pollination. However, current phylogenetic classification emphasizes evolutionary relationships rather than these superficial morphological similarities.1

The order comprises eight families: Betulaceae, Fagaceae, Juglandaceae, Casuarinaceae, Nothofagaceae, Myricaceae, Rhoipteleaceae, and Ticodendraceae. These plants represent significant temperate deciduous or evergreen trees, including oaks, beeches, walnuts, hickories, and birches.21