Abstract
A new species of Begonia sect. Platycentrum is described here from the moist deciduous forest of Tirthamukh near Dumboor Lake, Tripura, India. It is similar to B. scintillans, B. chindwinensis and B. thomsonii but differs in plant size, hair characters, petiole length, flowers, stamens and fruits. A description with coloured photographs and information on the phenology and habitat are provided.