I have had Mary Todd on Daylily Hill for many years. Older photos show a giant continuous clump, but more recently, it has been divided into two separate clumps.
Mary Todd also blooms Early through Mid Season for me. Great color, very floriferous even though she is under tall oak trees. This cultivar survived at least 20 years of serious neglect and came through like a champ.
Older photo, 2017
Portrait from this July