Hadspen White
H. 'Hadspen White'
Medium to light green leaves. Supposedly has fragrant flowers but we really struggle to detect anything.

Alternative: H. 'Royal Standard'
Plant Size
  Large: 21" x 34"  
Leaf
  8" x 6"; green  
Flower
  White  
Parentage
  Registered as a hybrid of H. sieboldiana but more likely from H. plantaginea  
Hadspen WhiteHadspen White