Citation: F. Muell. & A. Bennett ex A. Bennett, J. Bot., Lond. 30:229 (1892).

Synonymy: P. cheesemanii sensu some Australian authors, non A. Bennett (1883); P. nataris sensu R. Br., Prod. Fl. Nov. Holl. 343 (1810), non L. (1753); P. sulcatus A. Bennett, Annln naturh. Mus. Wien 7:294 (1892). , Potamogeton natans

Common name: Floating pondweed.

Description:
Perennial, with stems to 2.7 m long; emergent leaves floating, long-petiolate, more or less thick and leathery, green, with inconspicuous secondary venation, broadly elliptic or ovate to round, 1.5-9.5 cm long; submerged leaves narrowly elliptic to broadly ovate, 5-23 cm long; stipular sheath free.

Spike (in fruit) 1.5-4.5 cm long.

Fruiting carpel 2.5-4 mm long, smooth or conspicuously sculptured, with 3 inconspicuous or crenulate or tuberculate dorsal ridges.

Published illustration: Sainty & Jacobs (1981) Waterplants of New South Wales, p. 378.

Distribution:  Occurs in still or gently flowing fresh water and on mud beside receding water. S.Aust.: FR, MU, SL, KI, SE.   All States. Conservation status: native Flowering time: Sept. — April and in July.

SA Distribution Map based on current data relating to specimens held in the State Herbarium of South Australia

Biology: No text

Taxonomic notes: P. acutifolius Link ex Roemer & Schultes (1818) Syst. Veg. 3:513. This is indigenous to Europe and Asia, but was recorded by F. Muell. from the Murray River. H. I. Aston (1973) considered this to be likely to be a Vic. or N.S.W. locality. She described it as similar to P. ochreatus but distinguished by having an acute to acuminate leaf apex compared with the obtuse apex of P. ochreatus.

Author: Not yet available