H. sieboldii 'Silver Halo'.
From Japan, this dwarf Hosta is a member of the H. sieboldii group like H. 'Kabitan'. Leaves are somewhat spoon-shaped with a good white margin. Leaves are broader than H. 'Kabitan'.
Green leaves are somewhat spoon-shaped and have a nice white border, from the same strain as H. 'Kabitan' but doesn't get as large and the leaves are broader, topped with pale lavender flowers.