Wildlife Spotting

I found this plant on country side while travelling to masti katte from Bangalore. .The leaves of this plant have stripes in light yellow colour I.brought it and planted it in my garden.I used the leaves for flower arrangement because they look very pretty. I never knew that it yield flowers.after one year it started yielding flowers.What surprised me was that the same plant have two type of leaves .plain green and one with yellow stripes, though it is yielding same white flowers !!! How can it be?