Thanks Elizabete. It is as I suspected. I had a couple more seedlings do
this too, but I didn't inspect them to be sure. I wouldn't mind seeing this
trait in some of the newer registrations I purchased, so now I will be
looking for it.
Also, now I need to come up with a planting design that will avoid seedlings
running into each other. One year, every plant that I dug and replanted in
the evaluation bed bloomed with two different plants. And, I was so sure
the clump was of only one.