Native to temperate coniferous forests of North America and eastern Asia, Canadian bunchberry is a commonly observed perennial member of the dogwood family. As common as it is, it still boasts a uncommon trait: it is believed to have one of the most rapid movements among all plants. The individual flowers (note: the four large white bracts surround a cluster of twenty or so individual flowers) can open in less than 0.4 milliseconds. As they open, the flowers expel pollen, initially accelerating the grains at a rate of 24000m/s2, or 2400 times the acceleration of gravity. For videos demonstrating the mechanism and further explanation, visit Tale of the Dogwood. One of the first few people to observe and subsequently publish the observations about this intriguing property was my uncle, who shares his experience in "The Explosive Pollination Mechanism in Cornus canadensis L.".
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