In school class room it was taught that transpiration is one of the plant's physiological functions. But do we know that 'reverse transpiration' is also a physiological function? Yes, it is so - in certain plants! In them leaf takes in water and sends it to the stem - reverse of what we learnt and expect - root takes in water and sends it to leaves via stem. These plants are described as 'Leaf - drinkers,' as their leaves are 'drinking' water.
