Ruppia megacarpa R.Mason

New Zealand J. Bot. 5: 525 (1967) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Robust perennial herb. Branches erect, c. 20–30(–200) cm long, usually zigzagged. Leaves 5–10(–25) cm long, 0.4–1 mm wide; undamaged apex 2-toothed or truncate. Perennating swollen shoots absent. Inflorescence raised to water surface on an axis which is up to 1 m long; axis coiled after pollination. Carpels (2–)4(–6), initially subsessile, stalk elongating as carpels mature until it is longer than carpel. Fruiting carpel 3–4 long, 2–3 mm diam. Flowers and fruits (Oct.–)Nov.–Mar.

CVU, DunT, EGL, GipP, MuM, VRiv, VVP, WaP, Wim. Also WA, SA, NSW. New Zealand. Occurs in brackish to saline coastal lagoons and lakes, estuaries and inland lakes.

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 megacarpa in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Ruppia megacarpa 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
Gippsland Plain present native
Warrnambool Plain present native
Central Victorian Uplands present native
Dundas Tablelands present native
East Gippsland Lowlands present native

State distribution

Distribution map
Western Australia
South Australia
New South Wales