Mimosa pudica (Mimosa pudica) got its name from the fact that he prefers to "shy away" from other people's touch. If you try to touch her, mimosa cells lose turgor pressure - internal pressure cells, as of the cells due to the chemical reaction will leave the water. Mimosa poniknet leaves sag.
Incidentally, the shy mimosa has a secret: in spite of the "shame" it is quite toxic, if you try to eat it.
via factroom.ru