Tofieldiaceae family accepted

Ruppiaceae family accepted

Potamogetonaceae family accepted

Posidoniaceae family accepted

Juncaginaceae family accepted

Hydrocharitaceae family accepted

Butomaceae family accepted

Cymodoceaceae family provisionally accepted

Aponogetonaceae family accepted

Araceae family accepted

Alismataceae family accepted

Scheuchzeriaceae family accepted

Zosteraceae family accepted

Maundiaceae family accepted