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Cornus canadensis
This plant is not just beautiful but also exhibits the fastest movements in the plant world. The flowers bloom and the pollen grains propelled in as less as half a millisecond. :)
http://www.asknature.org/strategy/506afd...
Yep, Bunchberry or Canada Dogwood - Cornus canadensis http://www.dec.ny.gov/pubs/60025.html