Momordica charantia  White
Bitter Gourd
 
This vine works well as a climber as well as a groundcover. Growing up to around 16 feet with dark green, lobed leaves  accented by yellow flowers, followed by, white, bumpy fruits. Flowers from April to May. Grow as an annual in most regions. Start and grow, culturally, like a cucumber. 
Fun Facts:
The name derives from latin "mordeo" indicating the jagged seeds