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one common green bottle fly being eaten by a venus flytrap flower

How Plants Can Count and Remember With No Brain

Plants like the Venus Flytrap can time things by the chemicals circulating in their systems

How can a plant remember anything, we might wonder? One way is that it may have specific chemicals circulating in its system. Calcium, according to a recent discovery, turns out to be the element that prompts Venus flytraps to shut their traps on insects—but only on the second try: A Venus flytrap’s short-term “memory” can last about 30 seconds. If an insect taps the plant’s sensitive hairs only once, the trap remains still. But if the insect taps again within about half a minute, the carnivorous plant’s leaves snap shut, ensnaring its prey. Curtis Segarra, “How Venus flytraps store short-term ‘memories’ of prey” at ScienceNews The Venus’s trap is more complex than a mousetrap because the plant can’t just clamp…