I doubt it killed them, ditch lilies are tough as nails. I'm going to dig them up and move them to the ditch. They will look funny growing out in the middle of the yard now that the tree is gone.
I'm paying more attention to the different types of foliage this year. Truthfully, foliage is all I have other than Spring bulbs at this time. Thanks to this thread, I'm going to start taking pictures of my foliage, as well as my blooms, for my spreadsheet.
Becky This has been a great thread.