What is a botanical sport? There are different ways of phrasing it but it amounts to a plant suddenly putting off a variant of the original plant; sometimes this process is referred to as a mutation.
The two-headed daylily is amazing!
We have ajugas all over the place, and a couple of years ago, one produced a variegated sport. Unfortunately, it never happened again.
I guess when anyone finds one---they need to take the time to try and propagate the "sport".
Somewhere I have read that some of the "sports" are due to virus.
Has that come up in your reading?
I loved this tidbit of information, really gets my mind to thinking. We have sports within the sempervivum plants, one of them is S. 'Oddity' with odd shaped leaves, and another is S. 'New Rhumba' with variegated leaves.