Trithuria sect. TrithuriaTrithuria sect. Trithuria is a section within the genus Trithuria native to Australia.DescriptionThe dehiscent fruit is a apocarpous monomerous follicle, which splits into three parts. The strongly sculptured seed does not have a thick cuticular layer.TaxonomyThe type species is ''Trithuria submersa''SpeciesIt has three species:Trithuria bibracteata Trithuria occidentalis ''Trithuria submersa''EtymologyThe section name Trithuria is derived from the Greek words τρεις treis meaning "three", and θυρις thyris meaning "window". It references the dehiscence of the fruit.DistributionIts species occur in Australia.PhylogenyTrithuria sect. Trithuria split from Trithuria sect. Hydatella about 16 million years ago in the Early Miocene.