Accepted By:
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Ehrendorfer, F. & M. H. J. Barfuss. 2014. Paraphyly and Polyphyly in the Worldwide Tribe Rubieae (Rubiaceae): Challenges for Generic Delimitation. Ann. Missouri Bot. Gard. 100(1–2): 79–88.
 
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Lorence, D. H. 1999. A nomenclator of Mexican and Central American Rubiaceae. Monogr. Syst. Bot. Missouri Bot. Gard. 73: 1–177.
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Nasir, E. & S. I. Ali (eds). 1980-2005. Fl. Pakistan Univ. of Karachi, Karachi.
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Ulloa Ulloa, C., P. Acevedo-Rodríguez, S. G. Beck, M. J. Belgrano, R. Bernal, P. E. Berry, L. Brako, M. Celis, G. Davidse, S. R. Gradstein, O. Hokche, B. León, S. León-Yánez, R. E. Magill, D. A. Neill, M. H. Nee, P. H. Raven, H. Stimmel, M. T. Strong, J. L. Villaseñor Ríos, J. L. Zarucchi, F. O. Zuloaga & P. M. Jørgensen. 2017. An integrated assessment of vascular plants species of the Americas. Science 358: 1614–1617 [online suppl. materials: 1-23 + 1-2497], t. 1-4 [f. S1-5].
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