Makahiya (Mimosa pudica)
The Sensitive plant (Mimosa pudica L.) is a creeping annual or perennial herb often grown for its curiosity value: the compound leaves fold inward and droop when touched, re-opening within minutes.
Other names given to this curious plant are Humble plant, Shame plant, Sleeping grass, Touch-me-not, and Mori Vivi (West Indies). The Chinese name for this plant translates to "shyness grass". The species epithet, pudica, is Latin for "bashful" or "shrinking".
from Wikipedia Encyclopedia