Murugan, P. & Murugan, C. (2021) Taxonomy of Ophiorrhiza pectinata: Indo–Lankan Species with Notes on Lectotypification and Identity of Ophiorrhiza falcata (RUBIACEAE). Phytotaxa 490 (3): 278–284. https://doi.org/10.11646/phytotaxa.490.3.6