This order consists in Apg3 of the families Nelumbonaceae, Platanaceae, Proteaceae.
In the Plant theory more Orders and Families are included like Buxaceae, Gunneraceae, Sabiaceae, Trochondendraceae and Vitaceae. These families are close relatives to Proteales. Including them in Proteales will make Proteales paraphyletic. But that is seen in the same way as Gymnospermae: a group from where new evolution as arisen. To make the group monophyletic the new evolution should be included but that would make the group too extensive.
1. Nelumbonaceae: Nelumbo, sacred lotus, a water plant, in the past often placed together with the Nymphaeaceae.
2. Sabiaceae: Meliosma, Ophiocaryon, Sabia; vines and climbers.
4. Platanaceae: Platanus.
5. Gunneraceae: Gunnera, Myrothamnus; Myrothamnus can be placed in its own family Myrothamnaceae.
7. Buxaceae: Buxus.
Trochodendraceae: Trochodendron, Tetracentron.