Ease to Grow: Moderate to ChallengingDormancy: YesNative Range: Peaty Wetlands of Europe, Africa, Asia, and AustraliaZones: 5-9 (4-10) The aquatic Waterwheel Plant, Aldrovanda vesiculosa, is an aquatic, free-floating, rootless carnivorous plant of boggy waters. The rope-like plant contains successive whorls of bristly traps.  Each trap shaped like a small, wide-mouth clam. …