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Like when for example, when their seed pods pop open.

2006-07-05 10:51:03 · 7 answers · asked by John L 1 in Science & Mathematics Botany

7 answers

Plants that depend on wind to disperse their seeds tend to produce woody fruits, so they crack open, making noise.

Some leguminous plants have explosive devices on their fruits, to allow seeds a long dispersion, water adds up inside some chambers and then when pressure is really high it explodes making noises.

2006-07-05 10:52:53 · answer #1 · answered by pogonoforo 6 · 1 0

I liked this guys explanation -- will have to go hunting for some!

"Wisteria is a member of the Pea family, Fabaceae (as are other exploders including lupine and scotch broom). Most of us know it as a climbing vine, with purple, and sometimes white, flowers in the early spring. Less noticeable, at least from a distance, are the seed pods that form afterwards.

The pea-like pods, unremarkable from an ornamental perspective, are often overlooked in a profusion of vigorous leaf growth, especially because they’re green until they mature into 4-6 inch long hard shells. The pods turn brown as they dry on the vine. It’s after that drying process is complete that the fun begins, that and a hot Indian summer day.

It’s on those hot days that the seed pods are most likely to explode, typically later in the day after they’ve had a chance to absorb the most heat. If you have patience, you can sit and watch it happen. Look for empty husks where there weren’t any before (next to a lawn or walkway is perfect for this), then sit and watch. In fact, it’s more accurate to say “sit and listen”, because it practically impossible to be watching one when the moment occurs. It’s kind of like listening to the first few kernels of popcorn pop, the noise is a sharp crack followed by the sound of seeds landing away from the plant. If the wisteria is near a building, you can catch the sound of seeds bouncing off windows or walls, when it’s near a driveway or street, you can hear the seeds skitter across the surface.

The force of the explosion is truly remarkable; enough so that I don’t look directly at the plant if I’m not wearing glasses. I’ve seen a seed come to rest a full 70 feet from the plant, starting no more than 8’ off the ground and landing in the street (which starts 35’ from the plant), coming to rest against the curb on the far side. It’s exciting to see!"

More on the site below.

2006-07-06 14:15:54 · answer #2 · answered by Yahzmin ♥♥ 4ever 7 · 0 0

actually when you water a bulbous plant like Amaryllis that has not been watered for long, you too will hear squeaky sound of the scales of the bulb shifting. i hear this every time i water after myholiday or after the plants´ dry winter season.

sorry, but what you hear in case of touch me not are not the pods opening, but ONLY the seeds hitting things, you can check that urself. and this is also the cause of most, but not all noise created when seedpods of various plants open.

as far as i know, one of the plants that seriously make noise by the pod that opens, is Hura, see the link below

and dont forget that some plants make really distinctive sound when wind blows, whispering or shiveling - there is a kinda reed here that is called rustling grass in our language, and the easiest way to recognize indeed is to touch it whether it rustles or not - Phalaris arundinacea

2006-07-06 05:02:18 · answer #3 · answered by iva 4 · 0 0

You can hear corn growing after a rain,after a dry spell. The ears squeak. It's a crazy sound. You can also hear touch-me-nots as you pass by, the seed pods pop open.

2006-07-05 23:53:37 · answer #4 · answered by Emee 3 · 0 0

Noisy ones

2006-07-06 13:28:53 · answer #5 · answered by Anonymous · 0 0

I have heard of whispering aspen trees, and they make that sound when the wind moves their leaves against each other.

2006-07-06 05:09:49 · answer #6 · answered by Nosy Parker 6 · 0 0

one sound that all plants make is that they whine when they are watered, but we humans can't hear it (too high-pitched)

2006-07-06 00:02:23 · answer #7 · answered by CLBH 3 · 0 0

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