| Trithuria filamentosa | |
|---|---|
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Order: | Nymphaeales |
| Family: | Hydatellaceae |
| Genus: | Trithuria |
| Section: | Trithuria sect. Hydatella |
| 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]