| Trithuria filamentosa | |
|---|---|
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Order: | Nymphaeales |
| Family: | Hydatellaceae |
| Genus: | Trithuria |
| Species: | T. filamentosa |
| Binomial name | |
| Trithuria filamentosa | |
 | |
| Trithuria filamentosa is endemic to Tasmania, Australia [1] | |
| Synonyms [1] | |
Hydatella filamentosa (Rodway) W.M.Curtis | |
Trithuria filamentosa is a species of aquatic plant in the family Hydatellaceae endemic to Tasmania, Australia. [1]
It is an annual or perennial, diminutive, aquatic herb [2] with elongate, 0.7–1.5 mm wide, erect, sympodial rhizomes with adventitious roots. [3] The pale green, linear, acute leaves [4] are 1-2 cm long. [5]
It is a monoecious species with mostly unisexual reproductive units ("flowers"), but more rarely with bisexual reproductive units. [6] [7] The male reproductive units, which are fewer in number than the female ones, [2] [7] consist of 2–4, lanceolate, 3–5 mm long bracts, as well as 4–6 stamens. The stamens have red to purple, 2 mm long anthers, and 6 mm long filaments. [7] The female reproductive units consist of 2–4(5) bracts, [6] as well as up to 20 carpels. The elliptical-ovoid, fruit is indehiscent. [2] The seeds are smooth. [6] It may be reproducing apomictically, or may predominantly rely on self-pollination. [8] Flowering and fruiting occurs from December to April. [2] [9]
The chloroplast genome is 180562 bp long. [10]
It is endemic to Tasmania, Australia. [1]
It was described by Leonard Rodway in 1897. [4] The lectotype was collected by Rodway in Broad River, Tasmania, Australia in December 1896. [11] [6] It is placed in the section Trithuria sect. Hydatella. [8]
The specific epithet filamentosa, from the Latin 'filum' for thread, means thread-like. [12] [13] The stamens have long, filiform filaments. [4]
It occurs in marshes, pools on mud flats along rivers, [4] lakes, tarns, [2] [5] and stream margins. [2]
The Cabombaceae are a family of aquatic, herbaceous flowering plants. A common name for its species is water shield. The family is recognised as distinct in the Angiosperm Phylogeny Group IV system (2016). The family consists of two genera of aquatic plants, Brasenia and Cabomba, totalling six species.
Hydatellaceae are a family of small, aquatic flowering plants. The family consists of tiny, relatively simple plants occurring in Australasia and India. It was formerly considered to be related to the grasses and sedges, but has been reassigned to the order Nymphaeales as a result of DNA and morphological analyses showing that it represents one of the earliest groups to split off in flowering-plant phylogeny, rather than having a close relationship to monocots, which it bears a superficial resemblance to due to convergent evolution. The family includes only the genus Trithuria, which has at least 13 species, although species diversity in the family has probably been substantially underestimated.
Trithuria is a genus of small ephemeral aquatic herb that represent the only members of the family Hydatellaceae found in India, Australia, and New Zealand. All 13 described species of Trithuria are found in Australia, with the exception of T. inconspicua and T. konkanensis, from New Zealand and India respectively. Until DNA sequence data and a reinterpretation of morphology proved otherwise, these plants were believed to be monocots related to the grasses (Poaceae). They are unique in being the only plants besides two members of Triuridaceae in which the stamens are centred and surrounded by the pistils; in Hydatellaceae the resulting 'flowers' may instead represent condensed inflorescences or non-flowers.
Trithuria inconspicua is a small aquatic herb of the family Hydatellaceae that is only found in New Zealand.
Terry Desmond Macfarlane is a botanist and taxonomist, who has worked in both Australia and Peru. A senior research scientist at the Western Australian Herbarium, Macfarlane is associate editor of its journal Nuytsia and currently collaborates with researchers across Australia and in Canada, Germany, New Zealand, Russia, Spain and United Kingdom. He was also involved in the development of FloraBase, the Western Australian flora database.
Xyris marginata, commonly known as alpine yellow eye, is a monocot in the family Xyridaceae which is endemic to King Island (Tasmania) and Tasmania, commonly growing in button grass moorlands, at altitudes of up to 1070 meters (3,510.5 ft) above sea level. It was first collected by German-Australian botanist Ferdinand von Mueller in 1875.
Gonocarpus humilis, commonly known as shade raspwort, is a small herb in the genus Gonocarpus of the family Haloragaceae. Shade raspwort is common along the eastern coast of Australia, and grows in moist and shaded locations. The leaves have a rough and scabrous surface, giving the plant the common name raspwort.
Xanthosia dissecta, commonly known as cut-leaved xanthosia, is a species of flowering plant in the family Apiaceae and is endemic to south-eastern Australia. It is a prostrate, tufted herb with dissected leaves at the base of the plant, and small white or reddish flowers arranged in one or two umbellules, each with up to 3 flowers.
Trithuria austinensis is a species of aquatic plant in the family Hydatellaceae endemic to Western Australia.
Trithuria australis is a species of aquatic plant in the family Hydatellaceae endemic to Western Australia.
Trithuria bibracteata is a species of aquatic plant in the family Hydatellaceae endemic to Western Australia.
Trithuria cookeana is a species of aquatic plant in the family Hydatellaceae endemic to the Northern Territory, Australia.
Trithuria cowieana is a species of aquatic plant in the family Hydatellaceae endemic to the Northern Territory, Australia.
Trithuria fitzgeraldii is a species of aquatic plant in the family Hydatellaceae endemic to Western Australia.
Trithuria konkanensis is a species of aquatic plant in the family Hydatellaceae endemic to India.
Trithuria lanterna is a species of plant in the family Hydatellaceae endemic to Australia.
Trithuria occidentalis is a species of plant in the family Hydatellaceae endemic to Western Australia.
Trithuria polybracteata is a species of plant in the family Hydatellaceae endemic to Western Australia.
Trithuria submersa is a species of plant in the family Hydatellaceae endemic to the Australian states New South Wales, South Australia, Tasmania, Victoria, and Western Australia.
Trithuria inconspicua subsp. brevistyla is a subspecies of Trithuria inconspicua in the family Hydatellaceae endemic to the South Island of New Zealand.