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.
General:
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Batuyong, M. A. R., M. J. A. Calaramo & G. D. Alejandro. 2021. Inventory of Rubiaceae species in Mt. Pao Range, Ilocos Norte, northwestern Luzon, Philippines. Biodiversitas 22(8): 3604-3612.
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