Trithuria filamentosa
Trithuria filamentosa is a species of aquatic plant in the family Hydatellaceae endemic to Tasmania, Australia.
Description
Vegetative characteristics
It is an annual or perennial, diminutive, aquatic herb with elongate, 0.7–1.5 mm wide, erect, sympodial rhizomes with adventitious roots. The pale green, linear, acute leaves are 1-2 cm long.Generative characteristics
It is a monoecious species with mostly unisexual reproductive units, but more rarely with bisexual reproductive units. The male reproductive units, which are fewer in number than the female ones, 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. The female reproductive units consist of 2–4 bracts, as well as up to 20 carpels. The elliptical-ovoid, fruit is indehiscent. The seeds are smooth. It may be reproducing apomictically, or may predominantly rely on self-pollination.Flowering and fruiting occurs from December to April.