Dear All,
Hopefully now it is called Codariocalyx motorius (Houtt.) H. Ohashi. his plant is famous for its movement of small lateral leaflets at speeds rapid enough to be perceivable with the naked eye. This is a strategy to maximise sunlight by tracking the sun. Each leaf is equipped with a hinge that permits it to be moved in order to receive more sunlight, but the weight of these leaves means the plant must expend a lot of energy in moving it. To optimise movement of large leaves, each large leaf has two small leaflets at its base. These move constantly along an elliptical path, sampling the intensity of sunlight, and directing the large leaf to the area of most intensityThe common name is due to the rotation of the leaflets with a period of about 3 to 5 minutes; this was likened to a semaphore telegraph, a structure with adjustable paddles that could be seen from a distance, the position of which conveyed a message in semaphore, hence the common names.
The Tamils call this plant as "ThozhukaNNi"(Tamil: தொழுகண்ணி. It has been in use in Siddha medicine for centuries. It is a very useful remedy in adhearing the cut ends of flesh and healing it. It is also used in curing snake bite poisons. Hence it is also called snake charmer's root. Hence it is also called Aravaattip pachchilai (Tamil: அரவாட்டிப் பச்சிலை)
The plant is described in detail in Charles Darwin's 1880 The Power of Movement in Plants.
Regards
Tanay