I am so impressed by the ability of the experts on this forum, I am going to see if an ID of this plain hosta is possible.

This is a vigorous mature clump growing within a few feet of a very large moisture sucking clump birch.

The leaves have a matte finish, and are slightly wavy. They average 4" across and the clump is 3' wide. If I recall correctly the flowers are lavender. Although plain green, the clump has a pleasing form to me. I think it had 'moon' something in its name, but could have been mislabeled. It is likely a common hosta, as I got it from a local outlet years ago. I live in north central Canada, so have a short growing season compared to most of you.

Here's a picture of the clump and a single leaf. Any ideas?