Question: why do leaflets of mimosa fold when touched
Answer: Mimosa pudica ( from Latin : pudica `` shy , bashful or shrinking '' ; also called sensitive plant , sleepy plant , Dormilones , touch - me - not , or shy plant ) is a creeping annual or perennial herb of the pea family Fabaceae often grown for its curiosity value : the compound leaves fold inward and droop when touched or shaken , defending themselves from harm , and re-open a few minutes later .