The leaves of the Indian telegraph plant appear to greet the bright rays of the sun with a movement that resembles a ‘namaste’.
When exposed to bright sunshine, the leaves of the telegraph plant move up and down and from side to side for two to three minutes at a time, and then pause. The leaves keep moving thus all through the day as long as there is bright sunshine. The movement stops in the evening after the sun has set.
Scientists believe that the leaves move in this fashion in bright sunlight to avoid getting overheated.