Trithuria sect. Trithuria

Trithuria sect. Trithuria is a section within the genus Trithuria^[2] native to Australia.^[4]

Trithuria sect. Trithuria Temporal range: 16.07 –0 Ma PreꞒ Ꞓ O S D C P T J K Pg N Early Miocene – Recent[1]
Flowering Trithuria submersa
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Order:	Nymphaeales
Family:	Hydatellaceae
Genus:	Trithuria
Section:	Trithuria sect. Trithuria (Autonym)
Type species
Trithuria submersa Hook.f.[2][3]
Species
See here

Description

Fruiting Trithuria submersa in Tasmannia, Australia

The dehiscent fruit is a apocarpous monomerous follicle, which splits into three parts.^[5] The strongly sculptured seed does not have a thick cuticular layer.^[3]

Taxonomy

The type species is Trithuria submersa Hook. f.^[2][3]

Species

It has three species:^[2][3]

• Trithuria bibracteata Stapf ex D.A.Cooke
• Trithuria occidentalis Benth.
• Trithuria submersa Hook.f.

Etymology

The 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.^[6][7]

Distribution

Its species occur in Australia (Southwest Western Australia, Tasmania, and Southeast mainland Australia).^[4]

Phylogeny

Trithuria sect. Trithuria split from Trithuria sect. Hydatella about 16 million years ago in the Early Miocene.^[1][8]