Thanks, Leslie, Katie and Michele! I haven’t been able to find an AHS definition of a fused bloom. But, perhaps I missed it. Your contributions help define the phenomenon! : )
Leslie: “One can tell whether a bloom is fused or poly by counting the stamen.”
Katie: “My understanding is a fused bloom will have more than one pistil; a poly will still have just one, even with numerous stamens.”
Michele: “I have had regular blooms with 2 or 3 pistil which here we just call split pistils and these will not set pods that I know of.When I find these I just cut the bloom off.”