Bibliografía

Martínez-Cabrera, D., Teresa Terrazas, Hilda Flores & Helga Ochotorena 2008: Morphology, anatomy, and taxonomic position of Plocaniophyllon Brandegee (Rubiaceae), a monospecific genus endemic to Mesoamerica in Taxon 57.
Martínez-Cabrera, D., Terrazas, T. & Ochoterena, H. 2007. Leaf architecture of Hamelieae (Rubiaceae). Feddes Repert. 118: 286–310.