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Marco O. O. Pellegrini, Charles N. Horn, Rafael F. Almeida: Total evidence phylogeny of Pontederiaceae (Commelinales) sheds light on the necessity of its recircumscription and synopsis of Pontederia L. In: PhytoKeys, Volume 108, August 2018, S. 25–83. doi:10.3897/phytokeys.108.27652online.