Three new species of Plectranthus L'Her. (Lamiaceae) from south Western Ghats, India

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 comparisons with allied taxa, and colour images are provided to facilitate easy identification in the field.