Bog Pondweed - Potamogeton polygonifolius


Fruit spike 1 to 4 cm.  Floating leaves, blade 2 to 6 cm x 1 to 4 cm. Both floating and submerged leaves are stalked.  Leaf-stalks typically much longer than leaf-blades. Stalk of fruit-spike does not widen towards the spike.  Fruit densely packed.

Identification difficulty
Recording advice

The County Recorder has asked for a specimen of this plant to be retained for verification


May grow as an aquatic in shallow water in lakes, pools, the backwaters of rivers, streams and ditches, or in a dwarf, sub-terrestrial state in wet Sphagnum lawns or `brown moss` communities. It is usually restricted to acidic water, only rarely occurring in highly calcareous but nutrient-poor sites.

When to see it

In flower during March, June, July and August.

Life History

Rhizomatous perennial herb.

UK Status

Its strongholds in Britain are in Scotland and Wales and in south-western England.

VC55 Status

Rarely recorded in Leicestershire and Rutland.

be our species champion

Leicestershire & Rutland Map


Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

UK Map