Sp. Pl. 126 (1753) APNI
Threat status:Victoria: data deficient (k)
Submerged herb, with branches terete, up to c. 2 m long. Leaf sheath free, up to 1 cm long, not persistent; ligule absent. Leaves sessile, basally clasping branch; lamina ovate to circular, 1–5(–7)cm long, 1–3(–4)cm wide, thin and translucent; base cordate; margin mostly undulate; apex obtuse; 9–21 principal longitudinal veins. Inflorescence c. 8–15-flowered. Infructescence 1–2 cm long. Fruiting carpels 2.5–3 mm long (including distal point), smooth or very obscurely keeled dorsally with 2 faint lateral ridges, distally with a ± straight point c. 0.5 mm long. Flowers and fruits Dec.–May.
EGL, EGU, GipP, Glep, GGr, HSF, MuM, RobP, VVP, WaP. Occurs in flowing fresh water in creeks and rivers, on sandy, stoney or muddy substrates. Apparently tolerates brackish water and still water (Aston 1973).
The leaves may be confused with the submerged leaves of P. australiensis, P. cheesemanii, and P. sulcatus; however, the clasping leaf-bases of this species readily distinguish it from these other species.
|Bioregion||Occurrence status||Establishment means|
|Victorian Volcanic Plain||present||native|
|East Gippsland Lowlands||present||native|
|East Gippsland Uplands||present||native|
|New South Wales|
|Australian Capital Territory|