skunk cabbage

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A foul-smelling aroid plant (Symplocarpus foetidus) of eastern North American wetlands, having small flowers on a spadix enclosed in a greenish or purplish spathe and blooming early in the spring.
• noun A similar aroid plant (Lysichiton americanus) of western North America, having a bright yellow, stalked spathe.

from The Century Dictionary.

• noun See cabbage.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun Symplocarpus foetidus, a low-growing plant native to the wetlands of eastern North America.
• noun Lysichiton americanus, a low-growing plant native to the wetlands of western North America.
• noun Lysichiton camtschatcense, a low-growing plant native to the wetlands of eastern Asia.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun deciduous perennial low-growing fetid swamp plant of eastern North America having minute flowers enclosed in a mottled greenish or purple cowl-shaped spathe
• noun clump-forming deciduous perennial swamp plant of western North America similar to Symplocarpus foetidus but having a yellow spathe