of Indiana, this non-registered cultivar is
of unidentified parentage.
Kovalcsik of Michigan sent us the following comment about a
visit she made to Bob's garden: "He
gave me a piece of a hosta called 'Grand Calumet River'.
I'm not sure I have it anymore, but I do know that he
had such a hybrid and that it was of mammoth size in his
woodland garden. I personally saw it as he was digging a
piece for me."