Potamogeton polygonifolius

Tracheophyta MagnoliopsidaPotamogetonaceaePotamogetonPotamogeton polygonifolius


This rhizomatous perennial herb may grow as an aquatic in shallow water in lakes, pools, the backwaters of rivers, streams and ditches, or in a dwarf, subterrestrial 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. 0-780 m (Lochan an Tairbh-uisge, Mid Perth).



World Distribution

Suboceanic Temperate element; also in N. America.

Broad Habitats

Light (Ellenberg): 8

Moisture (Ellenberg): 10

Reaction (Ellenberg): 4

Nitrogen (Ellenberg): 2


Salt Tolerance (Ellenberg): 0

January Mean Temperature (Celsius): 3.3

July Mean Temperature (Celsius): 13.9

Annual Precipitation (mm): 1254

Life form information

Height (cm): 10

Length: 70

Perennation - primary


Life Form - primary

Perennial hydrophyte (perennial water plant)

Life Form - secondary


Comment on Life Form

"When growing in mud, it is a rhizomatous hemicryptophyte."



Clonality - primary

Irregularly fragmenting (mainly water plants)

Clonality - secondary

Rhizome far-creeping

Distribution information

Count of 10km squares in Great Britain: 1841

Count of 10km squares in Ireland: 582

Count of 10km squares in the Channel Isles: 5

Weighted Changed Factor: -18

Weighted Change Factor Confidence (90%)


Distribution information

JNCC Designations


PLANTATT - Attributes of British and Irish plants. (.zip 1455KB) This dataset was compiled and published in 2004, and last updated in November 2008. Download includes an Excel spreadsheet of the attributes, and a PDF explaining the background and nomenclature. Note that the PDF version is the booklet as published, whereas the Excel spreadsheet incorporates subsequent corrections. A hardcopy can be purchased from the Centre for Ecology and Hydrology.