I think this type of begonia boliviensis is Bossa Nova White. I pretty much ignore the plant most of the time, until the flowers come on, and then I adore it. But every year it is showier, and it stays healthy. One can see pictures online of huge displays in hanging baskets (especially of the brilliant colors), and I’m tempted to try rooting a cutting… but maybe I’ll just try to give mine a little more nourishment in the future. I am always thrilled when it sprouts up and begins to bloom again.