Now that is the deep end of botany. I don't know about that but in the Northern areas(Pakistan) the root stock is different, here different and down South different. The local names are also different. Sorry Lynn, I don't know but there has to be some fruit grafting expert on ATP in some corner, maybe he can answer it better. The problem is that you all have taken it one level up, here Kumqat is a Kamqat, not exactly true but then I only grow maybe the ones specialising in Citrus here can reel of names. Citrus farmers mostly then nursery trade. I will also check up in the morning. Sorry about cross posting but can not do much.
Regards,
Arif.