There are Mimosa species that have a special characteristic; when they're touched, they fold their leaves, then re-open it a few minutes after. <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />
The Sensitive plant. Northern Whitecedar (
Thuja occidentalis)
An evergreen coniferous tree in the cypress family (even not a cedar <img src="/ubbthreads/images/graemlins/tongue.gif" alt="" />), native to the northeastern US and southeastern Canada.