John, I've also got this lovely massive list of edible cultivar descriptors, and I can't recall where I might have found it. I think somebody else here sent it to me, and I'm not sure where they got it either. It strikes me that it might be from the Bioversity.
I'll attach it here so that you can grab it. Best of luck!
To answer your question, it was by asking other people here that I figured out what the 'Ingles' cultivar names are for the various South American bananas I grow and have encountered, and what the various and assorted features of these bananas are so that I can look at them and say "oh, it's an Orito" or whatever.
