skunk cabbage.

Science Now: Skunk cabbage (Symplocarpus foetidus) is widespread in the woods of northeastern North America and Asia. Skunk cabbage shares more than a healthy stink with its warm-blooded namesake: like skunks, people, and other animals, the plant produces body heat. Now, a clever mathematical analysis has shown that this rancid relative of the lily may have a beautifully simple thermostat.