Evergreen clematis

Clematis armandii (also called Armand Clematis or Evergreen Clematis) is a flowering vine of the genus "Clematis". 
"C. armandii" has good smelling 2.5-inch white flowers in spring. Its dark green leaves droop and it serves well as a screen. Its leaf tips may burn badly if grown in salty soil or water. It is native to China.