I have not been able to find enough information to id this ping. It was purchased on 2/24/2001. It was about 2 inches in diameter. Today it is just over 4 inches in diameter. I has produced two new offshoots since purchase. It does not produce plantlets on the leaves. The photo of the plant below is of one of the offshoots. Of the 2 plants originally purchased, there are now 5. Each is in bloom with several flower stalks with a single white flower.
I have not had any rotting problems except when I put ants on the leaves. The plant does well on a diet of gnats.
The flower is white. But the next photo makes it appear somewhat purple. This was due to poor lighting at the time the photo was taken.
I do have several guesses of my own, but each time I try to ID the plant, something doesn't fit.