Althenia preissii (Lehm.) F.Muell.

Slender Water-mat

Key Syst. Vict. Pl. 1: 443 (1888)

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Plants monoecious. Leaves not tapering distally; auricles 1.5–2 mm long; leaf margin entire; apex acute or acuminate. Female flowers with pedicel 0.5–1 (-1.5) mm long, not projecting beyond leaf-sheath; stigmas narrow, obliquely funnel-shaped, c. 0.2 mm long, margin irregular. Male flowers with scales 3-lobed; anther mass 6-locular; pedicel 3–5 mm long at anthesis. Fruit smooth, 2–2.5 mm long (excluding style); fruiting pedicel not extended, so fruit usually enclosed by leaf-sheath. Flowers Sep.–Feb.(–Apr.).

DunT, GipP, OtP, VVP, WaP, Wim. Also WA, SA, Tas. Occurs in shallow, saline and brackish water.

Often confused with Althenia cylindrocarpa (refer to that species).

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 preissii (Lehm.) F.Muell.).
Updated by: Neville Walsh, 2018-03-01
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Lilianae
order Alismatales
Higher taxa


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <>. Find Althenia preissii in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Althenia preissii in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Wimmera present native
Victorian Volcanic Plain present native
Gippsland Plain present native
Otway Plain present native
Warrnambool Plain present native
Dundas Tablelands present native