Althenia marina (E.L.Robertson) Yu Ito

Sea Water-mat

Molec. Phyl. Evol. 98: 267 (2016)

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Threat status:Victoria: vulnerable (v); listed in Flora and Fauna Guarantee Act 1988

Plants dioecious. Leaves not tapering distally; auricles 2–2.5 mm long; leaf margin entire; apex usually truncate with a central mucro. Female flowers with pedicel 1–2(–5)mm long; stigmas obliquely funnel-shaped, c. 0.3–0.5 mm wide, margin irregular. Male flowers with scales 3-lobed; anther mass 6-locular; at anthesis the pedicels elongate to 10–15 mm long and extend beyond leaf-sheath. Fruit smooth with a slight ridge dorsally, (1–)1.3–1.7(–2) mm long (excluding style); fruiting pedicel not or only slightly extended, 1–1.5 mm long, so fruit not or only slightly extended beyond the leaf-sheath. Flowers mostly Jul.–Dec.

GipP, OtP. Also SA, Tas. Occurs in marine intertidal (mid-eulittoral) areas of western Port Phillip Bay on muddy substrates with Zostera muelleri and Ruppia maritima.

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 marina E.L.Robertson).
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 marina in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Althenia marina in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Gippsland Plain present native
Otway Plain present native