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Potamogeton nodosus Poir.

Synonym	:	Potamogeton canareinsis Link
Family	:	Potamogetonaceae
Local name	:	English- Long leaf pondweed
Flowering and fruiting period	:	Throughout the year
Distribution		Indo-Malesia, Europe, Africa and America
Habitat	:	Marshy areas
IUCN status	:	Least concerned
Key Botanical Characters :  Perennial, rhizomatous and aquatic. Stem branched,leafy, terete and simple. Leaves heterophyllous, submerged leaves petiolate,  veins 9 or more, thin translucent, ; floating leaves broadly ovate,elliptic, coriaceous.  Stipules free, keeled,lanceolate 2-15 cm long, 8-10 mm broad. Spikes cylindric, 4.5-11 cm long, 1.5-2.5 mm broad; peduncle 7-11 cm long. Flowers in whorls, sessile, small. Perianth segments small,obtuse, entire, c. 1.5 mm long. Stigma short. Fruitlets  , 2-3 mm broad, obliquely obovoid, spongy, ventral margin convex, shortly beaked.