Rank Genus | ||
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Similar Nymphaeales, Cabombaceae, Centrolepidaceae, Trimenia, Austrobaileyales | ||
Trithuria is a genus of small aquatic herb, which represent the only members of the Family Hydatellaceae found in India, Australia, and New Zealand. Most of the 12 formally characterised species of Trithuria are found in Australia, with the exception of T. inconspicua and T. konkanensis, which are found in New Zealand and India, respectively.
Contents
These diminutive, moss-like, aquatic plants are the closest living relatives of the two closely related families Nymphaeaceae (water-lilies) and Cabombaceae. Together, these three families compose the order Nymphaeales in the APG III system of flowering plant classification. Trithuria (Hydatellaceae) diverged from the rest of Nymphaeales soon after Nymphaeales diverged from its sister taxon, which comprises all of the flowering plants except the two orders Nymphaeales and Amborellales.
Taxonomy
The genus Hydatella was recently subsumed into Trithuria based on the following morphological synapomorphies:
Species and distribution
- Trithuria austinensis D.D.Sokoloff - Western Australia
- Trithuria australis (Diels) D.D.Sokoloff - Western Australia
- Trithuria bibracteata Stapf ex D.A.Cooke - Western Australia
- Trithuria cookeana D.D.Sokoloff, Remizowa, T.D.Macfarl. & Rudall - Northern Territory of Australia
- Trithuria cowieana D.D.Sokoloff - Northern Territory
- Trithuria filamentosa Rodway - Tasmania
- Trithuria inconspicua Cheeseman - North Island of New Zealand
- Trithuria konkanensis S.R.Yadav & Janarth. - Maharashtra
- Trithuria lanterna D.A.Cooke - Northern Territory, Western Australia, Queensland
- Trithuria occidentalis Benth. - Western Australia
- Trithuria polybracteata D.A.Cooke ex D.D.Sokoloff, Remizowa, T.D.Macfarl. & Rudall - Western Australia
- Trithuria submersa Hook.f. - Western Australia, South Australia, Victoria, New South Wales, Tasmania
