Random plant event: Begonia 'Coffee Texas Star' flower

My plants at home, or at least some of them, are doing this now, too, but none of those pictures turned out particularly well. This plant is the last one remaining of the five or so that I brought in to work, and it's done shockingly well in the heat and humidity of the greenhouse -- I just moved it into a 6-inch pot, whereas some of the plants I grew at the same time (see older post) are still