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Cephaelis kaieteurensis Wernham
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Delprete, P. G. & J. H. Kirkbride, Jr. 2016. New combinations and new names in Palicourea (Rubiaceae) for species of Psychotria subgenus Heteropsychotria occurring in the Guianas. J. Bot. Res. Inst. Texas 10(2): 409–442.
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Taylor, C. M. 2010-2025. Studies in Tropical Rubiaceae.
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Taylor, C. M. 2015. Rubiacearum americanarum magna hama pars XXXIV: The new group Palicourea sect. Tricephalium with eight new species and a new subspecies (Palicoureeae). Novon 24(1): 55–95.
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Psychotria appuniana Steyerm.
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Delprete, P. G. & J. H. Kirkbride, Jr. 2016. New combinations and new names in Palicourea (Rubiaceae) for species of Psychotria subgenus Heteropsychotria occurring in the Guianas. J. Bot. Res. Inst. Texas 10(2): 409–442.
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Taylor, C. M. 2010-2025. Studies in Tropical Rubiaceae.
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Taylor, C. M. 2015. Rubiacearum americanarum magna hama pars XXXIV: The new group Palicourea sect. Tricephalium with eight new species and a new subspecies (Palicoureeae). Novon 24(1): 55–95.
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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. 2018 (onwards). An integrated Assessment of Vascular Plants Species of the Americas (Online Updates).
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