Article · Wikipedia archive · Last revised Jun 9, 2026

Trithuria sect. Trithuria

Trithuria sect. Trithuria is a section within the genus Trithuria native to Australia.

Last revised
Jun 9, 2026
Read time
≈ 2 min
Length
454 w
Citations
16
Source
Wikipedia ↗
Trithuria sect. Trithuria
Temporal range: Early Miocene – Recent1
Flowering Trithuria submersa
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Embryophytes
Clade: Tracheophytes
Clade: Spermatophytes
Clade: Angiosperms
Order: Nymphaeales
Family: Hydatellaceae
Genus: Trithuria
Section: Trithuria sect. Trithuria
(Autonym)
Type species
Trithuria submersa
Species

See here

Trithuria sect. Trithuria is a section within the genus Trithuria2 native to Australia.4

Description

Fruiting Trithuria submersa in Tasmannia, Australia source ↗

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.23

Species

It has three species:23

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.67

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.18

References

References

  1. Iles, W. J., Lee, C., Sokoloff, D. D., Remizowa, M. V., Yadav, S. R., Barrett, M. D., ... & Graham, S. W. (2014). Reconstructing the age and historical biogeography of the ancient flowering-plant family Hydatellaceae (Nymphaeales). BMC evolutionary biology, 14, 1-10.
  2. Iles, W. J., Rudall, P. J., Sokoloff, D. D., Remizowa, M. V., Macfarlane, T. D., Logacheva, M. D., & Graham, S. W. (2012). Molecular phylogenetics of Hydatellaceae (Nymphaeales): Sexual‐system homoplasy and a new sectional classification. American Journal of Botany, 99(4), 663-676.
  3. Iles, W. J. D. (2013). The Phylogeny and Evolution of Two Ancient Lineages of Aquatic Plants (Doctoral dissertation, University of British Columbia).
  4. Sokoloff, D. D., Remizowa, M. V., Macfarlane, T. D., Conran, J. G., Yadav, S. R., & Rudall, P. J. (2013). Comparative fruit structure in Hydatellaceae (Nymphaeales) reveals specialized pericarp dehiscence in some early–divergent angiosperms with ascidiate carpels. Taxon, 62(1), 40-61.
  5. Romanov, M. S., Bobrov, A. V. C., Iovlev, P. S., Roslov, M. S., Zdravchev, N. S., Sorokin, A. N., ... & Kandidov, M. V. (2024). Fruit and seed structure in the ANA‐grade angiosperms: Ancestral traits and specializations. American Journal of Botany, 111(1), e16264.
  6. Hooker, Joseph Dalton, Fitch, W. H., & Reeve Brothers. (1844). The botany of the Antarctic voyage of H.M. discovery ships Erebus and Terror in the Years 1839-1843 :under the command of Captain Sir James Clark Ross (Vol. 3, Issue 2, pp. 78-79). Reeve Brothers. https://www.biodiversitylibrary.org/page/28467263
  7. Department for Environment and Water. (n.d.). Trithuria submersa (Hydatellaceae) | Seeds of South Australia - Species information. Retrieved July 26, 2023, from https://spapps.environment.sa.gov.au/SeedsOfSA/speciesinformation.html?rid=4619
  8. Lin, Q. (2014). Using a low-copy nuclear gene (phosphoglycerate kinase; PGK) to explore the phylogeny of the aquatic plant family Hydatellaceae (Nymphaeales) (Doctoral dissertation, University of British Columbia).