S. M., M. M., and C. Murugan, “<i>Pteroceras viridiflorum</i>(Orchidaceae: Vandeae): A Sri Lankan species reported from India and a review of <i>Proteroceras holttumii</i>, Western Ghats, India”, Nelumbo, vol. 64, no. 2, pp. 181–186, Dec. 2022.