Looks like a Solanum. A little hard to tell for sure as a close up would help. Possibly Solanum jasminoides 'Album'

Darn, that's not it either.

Ok, my other suggestion is Sollya heterophylla 'Alba'

I'm trying to help a friend. Unfortunatly the pictures she took are not the greatist.

I keep looking at this and from the characteristics of the stems and their branching habit plus the way the flowers are held and their form too....I'm sticking with Solanum. If not the species S. jasminoides, then another that you have in the USA.

I presume this is a climbing or at least scandent plant?

Look at this (copy and paste the address below into your browser):

http://www.penick.net/digging/images/2008_03_16%20Bloom%20Day/White%20potato%20vine.JPG

Fractal, you found it! You were able to figure it out even with the poor photo quality.
Thank you so much.
Diana(and friend)