Shawn, I appreciate your observations as you have been growing peonies for so many years.
I use 'Itoh' interchangeably with 'Intersectional '; I guess because it is a shorter word, and most websites do that, too.
I have bought several of those large blooming Intersectionals in pots, and have found them to be root bound.
The colors are so wonderful and I wouldn't be without them!
Takara
Misaka