English: Beech order.
DD:
Phase 4, Silicon, Carbon;
Carbon series;
Silicon series;
Iron series.
TaxonomyFagales is one of the Orders in
Fabidae, part of the Nitrogen‑fixing clade.
In the
Plant theory the Nitrogen‑fixing clade is in
Phases 5 to 7. In the Cronquist system only four families,
Betulaceae, Corylaceae,
Fagaceae and Ticodendraceae were placed in
Fagales. In the Stebbins classification
Fagales was part of the Hamamelidae, which contained many wind pollinated trees. Many Families from that clade have been transferred to compeltely different positions in the
Apg3 classification like
Platanaceae,
Ulmaceae, and
Hamamelidaceae.
In the
Plant theory Fagales is placed in
Phase 4. This corresponds with
Fagales being mostly of big trees. The placement in
Subphases is tentative.
Subphases1.
Betulaceae, Corylaceae.
2.
Casuarinaceae.
3.
Nothofagaceae.
4.
Fagaceae.
5.
Juglandaceae.
6.
Myricaceae.
7.
Rhoipteleaceae.