We all love a gentle touch, right? Well, so do plants! Some plants, such as the Venus Fly Trap and Mimosa Pudica, are so taken with touch that they physically react to it. The Mimosa is a particularly bashful little flower, which shies away and hides it's beautiful head when touched. So be gentle, be patient, and keep your hands off if you want to see it in all it's glory.
Plants that react to contact, so please be gentle
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Jamie Matthews flickr (CC BY-NC-SA 2.0)