Title: Three new species of Plectranthus (Lamiaceae) from south Western Ghats, India
Abstract: Three new species of Plectranthus (Lamiaceae) from south Western Ghats are here recognised for the first time, viz., Plectranthus petricola J.Mathew & B.J.Conn, Plectranthus idukkianus J.Mathew, Yohannan & B.J.Conn and Plectranthus saxorum J.Mathew, Yohannan & B.J.Conn. Taxonomic descriptions, morphological differences to their allied taxa and colour photographs are provided to facilitate easy identification in the field.