Accepted By:
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Alejandro, G. D. & S. Liede-Schumann. 2003. The Philippine Rubiaceae Genera: Updated Synopsis in INTKEY Databases of the DELTA System. Blumea 48: 261-277.
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Flora of China Editorial Committee. 2011. Flora of China (Curcurbitaceae through Valerianaceae with Annonaceae and Berberidaceae). 19: 1–884. In C. Y. Wu, P. H. Raven & D. Y. Hong (eds.) Fl. China. Science Press & Missouri Botanical Garden Press, Beijing & St. Louis.
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Turner, I. M. 2019. Flora of Singapore precursors, 12. Notes on various Rubiaceae genera. Gard. Bull. Singapore 71(1): 45–59.
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