Najadales is the botanical name of an order of flowering plants. A well-known system that used this name is the Cronquist system (1981), which used this name for an order in subclass Alismatidae with this circumscription: order Najadales family Aponogetonaceae family Scheuchzeriaceae family Juncaginaceae family Potamogetonaceae family Ruppiaceae family Najadaceae family Zannichelliaceae family Posidoniaceae family Cymodoceaceae family Zosteraceae The APG II system, used here, assigns the plants involved to the expanded order Alismatales, in the clade 'monocots'. References Historically recognized angiosperm orders