Potamogeton ochreatus Raoul

Blunt Pondweed

Ann. Sci. Nat. Bot., ser. 3, 2: 117 (1844) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Submerged herb, with branches flattened, up to 4.5 m long. Leaf sheath free, up to 1.5(–2)cm long, becoming lacerated or persisting as numerous long fibres; ligule absent. Leaves sessile; lamina linear, 2.5–9(–13)cm long, 0.2–0.5(-0.6) cm wide, translucent; base attenuate to acute; margin entire, flat; apex rounded to obtuse; (3 or)5 principal longitudinal veins, with numerous fine secondary longitudinal veins. Inflorescence c. 10–15-flowered. Infructescence 1.5–2.5 cm long. Fruiting carpels c.4 mm long (including distal point), basally smooth or with 3 low, smooth or faintly tuberculate dorsal ridges, distally with a conspicuous, slender, ± curved point c. 1 mm long. Flowers and fruits (Aug.–) Oct.–Mar.(–Apr.).

CVU, DunT, EGL, EGU, GipP, Glep, Gold, GGr, HNF, HSF, LoM, MonT, MuM, NIS, OtP, OtR, RobP, Strz, VAlp, VRiv, VVP, WaP, WPro, Wim. Also WA, NT, Qld, NSW, Tas. New Zealand. Occurs in still to strongly flowing fresh water, in agricultural dams, swamps, creeks and rivers, on muddy to gravelly substrates.

New vegetative growth of this species is difficult to distinguish from Potamogeton crispus (see notes under P. crispus for details).

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.
Updated by: Daniel Ohlsen, 2017-06-06
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Lilianae
order Alismatales
genus Potamogeton
Higher taxa


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <http://avh.chah.org.au>. Find Potamogeton ochreatus in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Potamogeton ochreatus in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Lowan Mallee present native
Murray Mallee present native
Wimmera present native
Glenelg Plain present native
Victorian Volcanic Plain present native
Victorian Riverina present native
Robinvale Plains present native
Gippsland Plain present native
Otway Plain present native
Warrnambool Plain present native
Goldfields present native
Central Victorian Uplands present native
Greater Grampians present native
Dundas Tablelands present native
Northern Inland Slopes present native
East Gippsland Lowlands present native
East Gippsland Uplands present native
Wilsons Promontory present native
Highlands-Southern Fall present native
Highlands-Northern Fall present native
Otway Ranges present native
Strzelecki Ranges present native
Monaro Tablelands present native
Victorian Alps present native

State distribution

Distribution map
Western Australia
South Australia
New South Wales
Australian Capital Territory