Floral ontogeny links Dialypetalanthus (Condamineeae) with the floral developmental morphology of other Rubiaceae

Background – Vegetative and fruit characters of the Amazonian genus Dialypetalanthus point to a position in Rubiaceae. However, its floral morphology is so deviant that was often placed family own. Even relationships outside Gentianales were postulated. Current molecular phylogenetic studies firmly show belongs Aims This study aims understand idiosyncratic compare it with development two other Condamineeae genera as well Rubiaceae for which ontogenetic data are available. Material methods SEM LM based ontogeny fuscescens , Mussaendopsis beccariana Pogonopus exsertus . Results main conclusions Flowers develop stamen-corolla-calyx tube, can be considered morphological link between The polyandrous androecium originates from an annular intercalary meristem at adaxial side tube.