Potamogeton australiensis A.Benn.

Thin Pondweed

J. Bot. 48: 149 (1910) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Threat status:Victoria: data deficient (k)

Emergent herb, with branches flattened, up to c. 2.7 m long. Leaf sheath free, up to 4 cm long, soon torn; ligule absent. Leaves usually thin and translucent, submerged leaves different from emergent ones. Submerged leaves sessile or very shortly petiolate; lamina narrowly ovate or narrowly elliptic to broadly ovate, 5–23 cm long, 0.5–9 cm wide; base rounded to often tapered; margin flat or often finely undulate; apex obtuse to subacute; 5–22 principal longitudinal veins, with finer, transverse secondary veins; distal submerged leaves more like emergent leaves, but often with petiole much longer than for emergent leaves. Emergent leaves floating, petiolate; lamina ovate or broadly elliptic to subcircular, 1.5–9.5 cm long, 0.9–6.5 cm wide, shining and often glossy; margin often finely undulate; 11–35 principal longitudinal veins, with prominent transverse secondary veins. Inflorescence c. 12–20-flowered. Infructescence 1.5–4.5 cm long. Fruiting carpels 2–2.5 mm long (including distal point), dorsally with a low smooth keel and 2 low lateral ridges, distally with a ± straight point less than 0.5 mm long. Flowers and fruits Dec.–Feb.

Brid, DunT, EGL, EGU, GipP, Glep, GGr, HSF, LoM, MonT, MuF, MuM, OtP, RobP, VRiv, VVP, WaP, WPro. Also SA, NSW, Tas. Occurs in still or slowing flowing fresh water, in heathland swamps and creeks, on muddy substrate.

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.
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Lilianae
order Alismatales
genus Potamogeton
Higher taxa

Victoria

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

State distribution

Distribution map
State
Western Australia
South Australia
Queensland
New South Wales
Australian Capital Territory
Victoria
Tasmania