Good afternoon,
I bought this houseplant from a nursery and one day I noticed a very defined black and white leaf emerging in the middle. It is now the tallest leaf of the plant and very striking! The black has ever so slightly taken over a small area of the white as it was 50/50 at the beginning. I wonder if you could identify the plant and explain why this has happened - is it normal? I have attached a couple of images.
Many thanks indeed