There is an image of this
cultivar on the
Hosta Library. From the photo on the HL website, it appears to be a large
size hosta with narrow, drooping, dark green leaves. This non-registered cultivar was
originated in Japan.
According to the
Hosta Library, "...'Rudolf's #1' is one of the seedlings
from seeds given to her by
S. Hirao from his experiments in inducing polyploidy.
The name would seem to imply it was her favorite. It is
probably the same as 'Hirao Majesty'."