Skunk Cabbage
(Lysichiton americanus)
Also called: Western skunk cabbage and Swamp lantern

The plant is called skunk cabbage because of the distinctive "skunky" odor that it emits when it blooms. This odor will permeate the area where the plant grows, and can be detected even in old, dried specimens. The distinctive odor attracts its pollinators, scavenging flies and beetles. (from Wikipedia)