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Tiny Plant Bursts Open at Explosive Speeds
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The bunchberry dogwood, a tiny shrub that grows in dense carpets in the fir and spruce forests of North America, is the fastest-moving plant ever discovered, researchers report in this week's issue of the journal Nature.
The plant bursts open in less than a millisecond, flinging its pollen grains with the force of a huge explosive -- at speeds about 800 times the force astronauts experience during take-off.
The plant's firing mechanism is similar in design to a medieval trebuchet catapult. As the petals of its tiny alabaster-white flower open, they trigger its stamens to shoot up and hurl pollen upwards and outwards. The whole process happens faster than the snap of a venus flytrap.
The researchers, from Williams College in Williamstown, Mass., speculate that the bunchberry, which only grows to a height of about 8 inches, may need the super-powered propulsion to maximize its chances of catching a breeze to carry its pollen to other plants far and wide.
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