Ruppia polycarpa R.Mason

New Zealand J. Bot. 5: 524 (1967) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Annual or delicate perennial herb. Branches not always obvious, up to 20(–40) cm long. Leaves 5–15 cm long, less than 0.5 mm wide; undamaged apex obtuse to subacute. Perennating swollen shoots sometimes formed in ephemeral habitats, then sickle-shaped. Inflorescence raised to water surface on an axis which is usually less than 1 m long; axis coiled after pollination. Carpels (4–)8(–16), initially subsessile, stalk elongating as carpels mature until it is longer than carpel. Fruiting carpel 2–3 long, 0.5–0.8 mm diam. Flowers and fruits Oct.–Feb.

EGL, GipP, Glep, LoM, OtP, VVP, WaP, WPro. Also WA, SA, NSW, Tas. New Zealand. Occurs in freshwater of dams, ditches and small creeks, in brackish water or in saline coastal lakes and lagoons.

Source: Conn, B.J. (1994). Potamogetonaceae (including Ruppiaceae). In: Walsh, N.G.; Entwisle, T.J. (eds), Flora of Victoria Vol. 2, Ferns and Allied Plants, Conifers and Monocotyledons. Inkata Press, Melbourne.
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Lilianae
order Alismatales
family Ruppiaceae
genus Ruppia
Higher taxa


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <>. Find Ruppia polycarpa in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Ruppia polycarpa in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Lowan Mallee present native
Glenelg Plain present native
Victorian Volcanic Plain present native
Gippsland Plain present native
Otway Plain present native
Warrnambool Plain present native
East Gippsland Lowlands present native
Wilsons Promontory present native

State distribution

Distribution map
Western Australia
South Australia
New South Wales