If BA was part of the cross description it likely is the initials of the source of parent origin. Beth Arthur? Not sure I am recalling correctly...
I'll be shipping my seed donation tomorrow. I chose what I think are six of my better crosses. For those who don't know who Sims is, he sold seed from his own crosses up till around 2006. He is married to the NALS Executive Secretary. I'm also providing 2n and 4n trumpet crosses involving his material. Couldn't help including my cross for pink edged yellow trumpets involving Tropical Isle...