To be more precise there were only four actually original 'Itoh" hybrids, of which all were yellow: ' Yellow Crown", Yellow Emperor, & I think 'Yellow Heaven & another "Itoh 'Yellow , starts with a D... ( sorry, forgot) The others, so-called "ITOH" are likely hybrid descendants resulting from those four original 'Itoh' (intersectional?) hybrids.
Mr. Itoh apparently did not live long enough to see the flowers bloom. I think they were finally registered many years afterward, about 1974 with the American Peony Society,.
