Is distyly in subtropical Psychotria brachyceras (Rubiaceae) similar to the general trends observed for the genus?

Distyly is a floral polymorphism that promotes cross-pollination through precise pollination. Psychotria mostly tropical genus of distylous Rubiaceae. Although widely studied in Brazil, some regions/species are still poorly explored, which hinders the understanding distyly system along greater geographical range. Here, we subtropical population brachyceras southern Brazil. For this, characterized morphs occurrence, reciprocity sexual structures, mating and incompatibility systems. In addition, compared values from other species based on gathered literature to understand how behaves. The showed equal proportions thrum (short stigma/high anthers) pin (high stigma/short morphs. Reciprocity was higher than average for inaccuracy between organs were evenly distributed organ types, indicating trend typical distyly. Higher fruit set rates intermorph open pollination treatments pollen tube growth observations confirmed has functional heteromorphic system. no signs distinct traits populations, seems ensure reproductive success maintenance.