Althenia australis (J.Drumm. ex Harvey) F.Muell.

Austral Water-mat

Key Syst. Vict. Pl. 1: 527 (1888)

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Plants 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.).

DunT, Gold, GGr, LoM, MuF, MuM, NIS, VRiv, VVP, Wim. Also WA, SA, NSW, ?Tas. Occurs in fresh, shallow water of swamps, dams and depressions.

Source: Conn, B.J. (1994). Zannichelliaceae. In: Walsh, N.G.; Entwisle, T.J. (eds), Flora of Victoria Vol. 2, Ferns and Allied Plants, Conifers and Monocotyledons. Inkata Press, Melbourne (as Lepilaena australis Drumm. ex Harv.).
Updated by: Neville Walsh, 2018-03-01
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Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <>. Find Althenia australis in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Althenia australis in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Lowan Mallee present native
Murray Mallee present native
Wimmera present native
Victorian Volcanic Plain present native
Victorian Riverina present native
Murray Fans present native
Goldfields present native
Greater Grampians present native
Dundas Tablelands present native
Northern Inland Slopes present native