Is there a pure white form of this plant? I seem to remember buying some of this but with another name attached .... like "Bishop's White".... but I thought it died and so discarded the ID.

In case I can't get a photo loaded --- the flowers and the under-petals are pure white with a thin green edge to the white. It otherwise looks exactly like "Turkestania", which always has a pinkish cast -- to my eye.

Here is a link that might be useful: