Droseraceae : Polypetalae

Perennial or annual carnivorous herbs, sometimes (Aldrovanda) submerged aquatics. Primary root often suppressed; stembase with adventitious roots, sometimes with corms or root tubers. Leaves spiral or rarely whorled, simple, often rosulate, the blade infolded or adaxially circinate in bud, either equipped with irritable, mucilage-tipped tentacles that entrap and digest insects and other little animals (fly-paper trap, Drosera), or modified into fast-closing snap-traps with sensitive bristles (Dionaea, Aldrovanda); intrapetiolar stipules often present. Inflorescences thyrso-paniculate, cincinnate, or (Aldrovanda) flowers solitary