Prompt – “the green lady” Jenny Greenteeth a.k.a. Wicked Jenny, Ginny Greenteeth and Grinteeth is a figure in English folklore. A river-hag, similar to Peg Powler and derived from the grindylow, she would pull children or the elderly into the water and drown them. The name is also used to describe pondweed or duckweed, which can form a continuous mat over the surface of a small body of water, making it misleading and potentially treacherous, especially to the unwary.