Abstract
This paper, in continuation of earlier ones (Mukherjee 2017, 2018), deals with the taxonomic studies of the genus Piper Linnaeus (Piperaceae) from India. It includes information on the identity, typification and nomenclature of ten additional species. The results report four new names: Piper courtallensis P. K. Mukh. nom. nov., Piper kurgianum P. K. Mukh. nom.nov, Piper lamarckianum P. K. Mukh. nom. nov., and Piper travancorianum P. K. Mukh. nom. nov. It also deals with the lectotypification and nomenclature of P. argyrophyllum Miquel, P. attenuatum Miquel and P. talbotii C. de Candolle in addition to supersession of previous lectotypification with new ones for P. leptostachyum Miquel and P. peepuloides Roxburgh. Additionally, new synonyms are added for P. obtusistigmum C.de Candolle and P. talbotii C. de Candolle. Identities of P. peepuloides Roxburgh, P. mullesua Don and P. rhytidocarpum J. D. Hooker as distinct species are reasserted. An overall evaluation of their identity and nomenclature including synonyms is included. Necessary explanatory notes are added for each of the species which are dealt alphabetically.