Hydrocharitaceae family accepted

Maundiaceae family accepted

Scheuchzeriaceae family accepted

Zosteraceae family accepted

Juncaginaceae family accepted

Butomaceae family accepted

Tofieldiaceae family accepted

Ruppiaceae family accepted

Potamogetonaceae family accepted

Posidoniaceae family accepted

Alismataceae family accepted

Cymodoceaceae family provisionally accepted

Aponogetonaceae family accepted

Araceae family accepted