This is one
of those cases where there are two hostas with the
same name. One is registered and, therefore, the
"official" name
while the other is a non-registered plant which
should have its name changed.
Dr. Ed Elslager of Michigan registered a
seedling of H. 'Color Glory' under this name in 2001 so that is
the "official" H. 'Regal Glory'. The medium size plant has medium
green foliage with creamy white streaks. Its leaves are broadly
ovate, slightly cupped and faintly corrugated with thick
substance. Pale lavender flowers bloom in July.
The non-registered
hybrid of H. 'Color Glory' × H. 'Krossa Regal' from
Dr. Ralph (Herb) Benedict of Michigan is also know by this name. It is a large size plant with heavily
variegated leaves. Lavender flowers bloom from mid-July into
August.
Fortunately to avoid confusion, According to
The Hostapedia by Mark Zilis (2009), this plant "...may no longer exist."