The Cronquist circumscription of Ranunculales is now known to be polyphyletic .
In the Cronquist system , the Papaveraceae and Fumariaceae ( including the plants in the optional family Pteridophyllaceae ) were treated as a separate order Papaverales , placed in this same subclass Magnoliidae .
The Cronquist circumscription of Papaverales is now known to be polyphyletic .
In the Cronquist system , the Papaveraceae and Fumariaceae ( including the plants in the optional family Pteridophyllaceae ) were treated as a separate order Papaverales , placed in this same subclass Magnoliidae .