That's interesting. I didn't know there was a Prairie Blue Eyes (dip) and a Chicago Blue Eyes (tet). I didn't know Marsh did that, either. And it does seem odd that people would prefer to bybridize with the converted tet Prairie Blue Eyes instead of the Chicago Blue Eyes. The only thing I can think of is the convertered version may have had bigger blooms and scapes, which will happen. Prairie Blue Eyes was 4 inches taller than Chicago Blue Eyes to start wtih. Maybe it was a significantly larger plant when converted.
For those that don't know, Marsh (John?) was hybridizing as tets were being developed. A lot of early hybridizers specialized in tets or dips. But Marsh had a line of dips, many wtih "Prairie" as the first word, and he also experimented with tets and named a lot of them with "Chicago" as the first word.
