Yunnan: Xianggelila, Hutiaoxia, Bendiwan, 2425m
Huge plant! I think this is B. asperifolia, and if so it's among the hardiest Begonias out there. Keep frost free the first winter, so you can give it a whole season to establish outside - and give protection against winter wet.
15+++ seeds per package. (We don't count, so expect a Begonia lawn)