sieboldii
H. sieboldii
This variegated form does not breed true so cannot be a wild species. The wild species has been named H. sieboldii f. spathulata (Miquel) in The Genus Hosta, (Schmid 1991).
Plant Size
  Small: 8" x 10"  
Leaf
  5" x 2"; green, white margins  
Flower
  Purple with whitish margins and stripes  
Parentage
  Form of species from Japan  
sieboldiisieboldii