Rohdeifolia
H. 'Rohdeifolia'
Narrow green leaf with a cream margin. Reduced to cultivar status due to it not being found naturally wild. It is sometimes incorrectly listed as H. 'Helenoides Albopicta'. RHS Plant Finder lists this as a species.

Alternative: H. 'Ginko Craig'
Plant Size
  Medium: 14" x 30"  
Leaf
  7" x 3"; green, white margins  
Flower
  Light purple with dark stripes  
Parentage
  Species, in dispute  
RohdeifoliaRohdeifolia