Thanks. I meant the grex name, not the clonal name. So like with my dens, any Blue Twinkle selfed or x another Blue Twinkle, be it the individuals 'Carmelas', 'Louise', unnamed or whichever- doesn't matter. It seems problematic to me from my background with animal genetics- best illustration I can think of at the moment is dogs; if you cross a Beagle with a Pug it's a Puggle. Puggles are quite consistent in type and personality. However, if you cross two Puggles, the resulting pups are technically still 50% Pug and 50% Beagle but will be all over the board in type- some will show a lot of Beagle, some mostly Pug, some will be a weird mishmash of traits and some will be like their F1 parents. In the first generation, you know it's 50% each, but the genes can split and pair off any which way in the second (F2) generation, resulting in an 'imbalance' if you will of genes and traits from each breed. That's why Labradoodles/Goldendoodles etc are still made from Poodle/Lab or Golden crosses and not generations of Labra/Goldendoodles- your F2 Labradoodle may well shed as heavily and aggravate your allergies as badly as any Lab. Den. Blue Twinkles (Betty Goto x canaliculatum) seem quite consistent from the ones I've seen, and if I buy one I expect certain traits- compact grower, small blue/purple antelope type fowers,, etc. A selfed or sib crossed 'Blue Twinkle' may not show those traits- it may have the yellow/green of canaliculatum instead of blue, it may be larger and more intermediate in type like Betty Goto, and so on. This is why I asked- it doesn't feel right to give the F2 the same designation as the F1, sort of like false advertising.

Ouch. So the moral of the story is don't use unregistered crosses in your own breeding unless you have the time and money to try and chase down the originator of the unnamed cross- for however many generations the crosses have been unnamed. I believe I saw a post here (by Amey) that if a goodwill effort is made and can be shown that you attempted to track down the crosses originator and either couldn't locate them or couldn't get a response from them, you could register that cross yourself?