Begonia sect. Microtuberosa Moonlight & Tebbitt
European Journal of Taxonomy 281: 4 (Moonlight et al. 2017a).
– Type: holotype: Begonia elachista Moonlight & Tebbitt.
Notes
This is a monotypic section and the only endemic section of Begonia to Peru. It was erected by Moonlight & Tebbitt (2017a) based upon molecular evidence, which demonstrated that B. elachista was distantly related from all other tuberous Andean Begonia species and allied with two sections endemic to the Atlantic Rainforests of eastern South America. It is best recognised by its much smaller size (<3 cm tall vs> 15 cm tall) and fewer stamens (two or four vs> 5) than all other tuberous Andean begonias.