Sensitive Plant Seed Pack

The Sensitive Plant is a creeping annual or perennial herb often grown for its curiosity value: the leaves fold inward and droop when touched, re-opening within minutes.  The species is native to South and Central America and is well known for its rapid plant movement.  In the evening the leaflets will fold together and the whole leaf droops downward.  It then re-opens at sunrise.  The leaves also close up under various other stimuli such as touching, warming, shaking or even extremely loud music!  According to Wikipedia, the movement is caused by "a rapid loss of pressure in strategically situated cells that cause the leaves to droop right before one’s eyes".