Which one?

A friend rooted a piece of this hoya for me but other than hoya,she didn't know which one.

P

With that little indentation/curve in the leaves, I'd say H. kerrii, the Sweetheart Hoya because the leaves look like hearts.

http://davesgarden.com/guides/pf/go/53912/

thanks plantladylin,that does indeed look like my friend's mature plant

P