These three Begonia species from the section Gobenia were introduced into cultivation sometime in the 1990’s. All three were from the area around Pacto, Ecuador. I don’t know if they were found sympatrically or if they were at various altitudes. But they do seem to be variable in their tolerance of heat. Pacto has an average elevation of 1300 meters. So while meeting their temperature needs is not incredibly difficult, they seem to do their best if temperatures are kept on the cooler side.