WordNet sense 1 (deciduous perennial low-growing fetid swamp plant of eastern North America having minute flowers enclosed in a mottled greenish or purple cowl-shaped spathe):

foetid pothos, polecat weed, Symplocarpus foetidus

WordNet sense 2 (clump-forming deciduous perennial swamp plant of western North America similar to Symplocarpus foetidus but having a yellow spathe):

Lysichiton americanum