This is yet another seedling of
H. 'Sieboldiana'. It was
registered in 1997 by
Peter Ruh of Ohio
but was originated by O. Meissner.
As with most plants with this background, it becomes a giant
size mound of blue-green foliage with slightly corrugated leaves
of thick substance. Near white flowers in clusters bloom from
late June into July.
The Hostapedia by Mark Zilis (2009), "...has been surpassed by many newer cultivars..."