This is an H. 'Fortunei' type of hosta which is a non-registered cultivar from
Gus Krossa of Michigan. It is a medium size hosta with
blue-green foliage that has unstable streaked
variegation. Lavender flowers bloom in July. Some people
feel that this is the same as H. 'White Christmas'.
The Hostapedia by Mark Zilis (2009), "...probably no longer exists."