The original IB crosses were between TBs & SDBs. Therefore an odd chromosome count which most of the time made them infertile. BBs are 48 ch. like the TBs so are u sually more fertile. Note I said usually. IBs often have smaller flowers.
IB Arazzi.
BB Hi Buddy
The flowers here look the same size, but BB is a bit larger. BBs usually bloom after the original IBs, but more complicated linage can change that. The SDB parent of an IB causes earlier bloom. Hope this is helpful.
IB Arazzi.
BB Hi Buddy
