Potamogeton acutifolius Link ex Roem. & Schult.

Sharp Pondweed

Syst. Veg. 3: 513 (1818) APNI

Taxonomic status:Accepted

Occurrence status:Extinct

Establishment means:Introduced

Submerged herb, with branches flattened, up to c. 4 m long. Leaf sheath free, up to c. 1.5 cm long, becoming lacerated or persisting as numerous long fibres; ligule absent. Leaves sessile; lamina linear, 3–1 lcm long, 0.2–0.4 cm wide, translucent; base attenuate to acute; margin entire, flat; apex acute to mucronate; 3(or 5) principal longitudinal veins, with numerous fine secondary longitudinal veins. Inflorescence c. 4–10-flowered. Infructescence 0.5–1 cm long. Fruiting carpels c. 3–4 mm long (including distal point), basally with 3 low, smooth or faintly tuberculate dorsal ridges and a single ventral bump, distally with a slender, ± straight point c. 0.5 mm long.

This European species has been once recorded for Australia from the Murray River. Aston (1973) considered this collection to be probably from Victoria or New South Wales. Flowering and fruiting times (in Australia) unknown.

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: Val Stajsic, 2019-01-08
 
References

Aston, H.I. (1973). Aquatic plants of Australia, Melbourne University 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 acutifolius in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Potamogeton acutifolius in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Central Victorian Uplands extinct introduced

State distribution

Distribution map
State
Victoria