“…Of the more than 190 species figured in the works of Feuer and Kuijt (1978, 1979, 1980, 1985), Muller et al (1989), Liu and Qiu (1993), Han et al (2004), Roldán and Kuijt (2005), Caires (2012) and Caires et al (2012, 2014), 24 are currently treated as synonyms of other species of the same genus (File S4; Tropicos.org 2016), and an additional 24 species have been moved to a different genus (see also Table XI, including further examples not covered in earlier studies). In three cases, the current view (Tropicos.org 2016) is rejected by pollen morphology and either confirms more traditional views or calls for more detailed investigation of the respective taxon.…”