David Slack, is a writter of Teen Titans, another DC show.
The title of this episode translates to: Flowers of Evil.
Batgirl: (to Batman) Well, there's your evil twin, but where's mine?
Plant Batgirl: Over here, ugly!
Batgirl: (after Batman punches an old woman) You knew she was a plant, right?
Plant Gordon: (to Barbara) Daddy is mad.
Barbara: Daddy is green!