Among the recent papers on the family and in particularly on Utricularia, much has been written on the morphology and physiology of the various species; the literature on the taxonomy of the family as a whole or of Utricularia in particular is rather scanty, the only paper dealing in a comprehensive manner with genera and species of the Utricularia being that of Benjamin (1847). The genus Utricularia is a very difficult one to deal with and to study in herbaria; most of the specimens are rather imperfect, as the leaves and stems are often omitted from the herbarium sheets; this may be due to carelessness on the part of the collectors, but often it is due to the fact that flowering takes place either before or after the appearance of the leaves and a leafy Utricularia is very difficult, not to say impossible