Beautiful pictures! First one is B. brevirimosa. Somewhere I read var. 'Exotica', and somewhere else I read that's not accurate. But the brevirimosa is right. Your other unidentified ones--some look like something I've seen, but even the most familiar ones look different. I'll do somelooking, but don't hold your breath. Mmm, those are lovely!
Hi, thanks for Identifying the correct name for me. Do you happen to know the history behind this Begonia? Any clue? How did it travel. Is it widely propagated in US or UK?