Tofieldiaceae family accepted

Ruppiaceae family accepted

Potamogetonaceae family accepted

Posidoniaceae family accepted

Alismataceae family accepted

Aponogetonaceae family accepted

Araceae family accepted

Hydrocharitaceae family accepted

Cymodoceaceae family provisionally accepted

Butomaceae family accepted

Juncaginaceae family accepted

Maundiaceae family accepted

Scheuchzeriaceae family accepted

Zosteraceae family accepted