a white-flowered swamp plant (Dionaea muscipula) of the sundew family, native to the Carolinas, having sensitive leaves with two hinged blades that snap shut, often trapping insects
See Venus' flytrap in American Heritage Dictionary 4
or Venus' flytrap also Venus's flytrap
noun
An insectivorous plant (Dionaea muscipula) of the coastal plain of the Carolinas, having sensitive, hinged, marginally bristled, two-lobed leaf blades that close and entrap insects.