This cultivar was listed on the
MyHostas Database website.
Monty and Julie Carlson of Minnesota, this non-registered cultivar is of unidentified parentage but has H. longipes var. latifolia 'Urajiro Hachijo' in its background.
Mikiko Lockwood in an article on The Hosta Library titled,
A Little About Japanese Hosta Terms defines the term urajiro as white-backed or white underside.
This one and H. 'Blueberry Smoothie' are called
the "Smooth Sisters".