Althenia australis
(J.Drumm. ex Harvey) F.Muell. Austral Water-matPlants monoecious. Leaves tapering distally; auricles 0.1–0.6 mm long; leaf margin minutely serrulate distally; apex tapering. Female flowers with pedicel 1.5–5 mm long; stigmas obliquely peltate, c. 1.5–2 mm wide, margin slightly irregular. Male flowers with scales free or fused and 3-lobed; anther mass 6-locular; pedicel not extended after anthesis. Fruit slightly ridged and tuberculate dorsally, 1.5–2.5 mm long (excluding style); fruiting pedicel reflexed from base, 25–70(–120) mm long, so fruit extended far beyond the leaf-sheath. Flowers (Sep.–)Nov.–Jan.(–Apr.).
LoM, MuM, Wim, VVP, VRiv, MuF, Gold, GGr, DunT, NIS. Also WA, SA, NSW, ?Tas. Occurs in fresh, shallow water of swamps, dams and depressions.
Conn, B.J. (1994). Zannichelliaceae. In: Walsh, N.G.; Entwisle, T.J., Flora of Victoria Vol. 2, Ferns and Allied Plants, Conifers and Monocotyledons, pp. 156–160. Inkata Press, Melbourne.