Bur Cucumber, a native species, has been added to the USWildflowers database (10/04/2012.) Scientific name is Sicyos angulatus.  Photo below was taken in Walker County, GA on Sep 25, 2012. Go to the Bur Cucumber detail page for more photos and information.

Bur Cucumber, Oneseed Bur Cucumber; Star Cucumber – Sicyos angulatus