Piper kurichyarmalanum J. Mathew & P.M. Salim and P. ovalifructum J. Mathew & P.M. Salim (Piperaceae) from the southern Western Ghats, Kerala, India, are described as new species based on morphological data. Diagnostic morphological characters, distribution and images of these species are presented, along with a key to species of Piper section Muldera (clade Muldera) in India. Piper megacarpum J. Mathew is synonymized with P. galeatum (Miq.) C.DC.