plantaginea 'China'
H. plantaginea 'China'
This is different to H. plantaginea. The flowers seem more intensely fragrant and the leaves are larger.

Alternative: H. 'Venus' - larger plant & double flowers!
Plant Size
  Medium  
Leaf
  10" x 8"; green  
Flower
  White, fragrant  
Parentage
  H. plantaginea selection  
plantaginea 'China'