huertas,
some of the new varieties are not hybrids, but are mutations or genetic variations of the same species...while some of the new varieties are actually hybrids (some are created purposefully, some are by chance)
I have one seedling that looks like chance a cross between the red (hybrid) jabo, and M trunciflora. I got the seeds from a trunciflora tree that's right near some red jabo trees...and they both flower at the same time.
whatever it is, I haven't seen another jabo thats like it!