I have seen nearly chlorophyll-free forms of African Violets. Usually
they still have little patches of green here and there in the leaf.
These freaks need to be regularly sprayed with a nutrient solution to
provide the sugar normally generated by photosynthesis. It makes for a
very sticky dusty mess, but when cleaned up for a show such a plant might
well win blue ribbons.
I think that a plant *completely* w/o chorophyll would be doomed unless
you kept it in-vitro on a nutrient substrate.
-- Rick