The plant doesn't really require 100 years to bloom, but a good, long time. The jury was out on how exactly how long--I was told 15, 25, and 45 years--but there was consensus that this plant came to Matthaei as a pup from the parent plant originally donated to Matthaei at the old location on Iroquois.
I was glad to be able to see it bloom. If you're in the area, swing by. The blooms should hold out for while.