Common name: Pondweed
Potamogeton drummondii Benth. APNI* Synonyms: Potamogeton similis A.Benn. APNI*
Description: Emergent aquatic perennial herb, rhizomatous. Stems terete, up to 4 m long; turions not recorded.
Stipules convolute. Submerged leaves sessile or petiolate; blade lanceolate, 3–10 cm long, 0.5–2.3 cm wide. Floating leaves petiolate; blade ovate to roundish, rounded or tapered at base, apex obtuse, acute or mucronulate, coriaceous, 0.8–3.5 cm long, 1–1.5 cm wide, with 5–16 veins.
Inflorescence a spike, emergent, dense, up to 2.4 cm long, terminal; peduncle erect, recurved when fruiting.
Fruit roundish, laterally compressed, with 3 ridges, the central one more prominent, with a prominent beak, 2.1–3 mm long (including beak).
Flowering: warmer months
Distribution and occurrence: From northeastern NSW south to Vic, Tas, SA and sw WA in permanent and semi-permanent waterbodies
NSW subdivisions: ST, SWS
Other Australian states: Vic. Tas. S.A. W.A.
Fruit and leaf differences suggest that this may include more than one taxon.
Text by SE Papassotiriou et al. (2011); edited KL Wilson (Sept 2011)
Taxon concept: SE Papassotiriou, SWL Jacobs & CB Hellquist, Fl. Australia vol 39 (2011)
APNI* Provides a link to the Australian Plant Name Index (hosted by the Australian National Botanic Gardens) for comprehensive bibliographic data
***The AVH map option provides a detailed interactive Australia wide distribution map drawn from collections held by all major Australian herbaria participating in the Australian Virtual Herbarium project.
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