Althenia bilocularis (Kirk) Cockayne

Small-fruit Water-mat

Nat. Hist. Canterbury 126 (1927)

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Plants dioecious. Leaves not tapering distally; auricles 0.5–0.8 mm long; leaf margin entire; apex truncate, usually appearing torn with 3 or more mucros, sometimes only with single mucro. Female flowers with pedicel up to 8 mm long; stigmas recurved, very obliquely funnel-shaped, deeply and narrowly divided (appearing 'feathery'). Male flowers with scales fused, small and cup-shaped; anther 2-locular; at anthesis the pedicels elongate to c. 7 mm long and extend the flowers beyond the leaf-sheath. Fruit smooth, very slightly ridged or tuberculate dorsally, 0.8–1.3 mm long (excluding style); fruiting pedicel ± erect, not or only slightly extended, 1.5–2.5(–5) mm long, so fruit not or slightly extended beyond the leaf-sheath. Flowers (Nov.–)Dec.–Mar.

GipP, MuF, MuM, OtP, VRiv, VVP, Wim. All States except NT. New Zealand. Occurs in fresh, brackish to slightly saline, shallow water (up to c. 1 m deep) of lakes and occasionally in gently flowing streams.

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 bilocularis Kirk).
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 bilocularis in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Althenia bilocularis in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Murray Mallee present native
Wimmera present native
Victorian Volcanic Plain present native
Victorian Riverina present native
Murray Fans present native
Gippsland Plain present native
Otway Plain present native