Trithuria filamentosa
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| 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]
Vegetative characteristics
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]
Generative characteristics
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]
Cytology
The chloroplast genome is 180562 bp long.[10]
Distribution
It is endemic to Tasmania, Australia.[1]
Taxonomy
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]