Do you mean like 'Constance Elliot'?

That's the only pure white one I can think of thats commonly found..
There's Quinquangularis, but it's kinda small..

{{gwi:1129485}}

Or... Here's one I created, but its not very exciting so I haven't named it..

{{gwi:1129487}}

As you can see.. It's very very small. :)

Hi I really like the one that you created,can we trade? even any of the other two, I am not familiar with names but I do like plants. Thanks M.