Potamogeton gramineus

Tracheophyta MagnoliopsidaPotamogetonaceaePotamogetonPotamogeton gramineus


This variable perennial is found in relatively shallow water in a variety of water bodies, including lakes, reservoirs, rivers, streams, canals and ditches. It tolerates a wide range of water quality, although it is absent both from the most acidic and oligotrophic sites and from the most eutrophic. It survives occasional, short-term desiccation. 0?915 m (Meall nan Tarmachan, Mid Perth).



World Distribution

Circumpolar Boreo-temperate element.

Broad Habitats

Light (Ellenberg): 7

Moisture (Ellenberg): 12

Reaction (Ellenberg): 6

Nitrogen (Ellenberg): 3


Salt Tolerance (Ellenberg): 0

January Mean Temperature (Celsius): 3.3

July Mean Temperature (Celsius): 13.8

Annual Precipitation (mm): 1170

Length: 80

Perennation - primary


Life Form - primary

Perennial hydrophyte (perennial water plant)



Clonality - primary

Irregularly fragmenting (mainly water plants)

Clonality - secondary

Rhizome far-creeping

Count of 10km squares in Great Britain: 473

Count of 10km squares in Ireland: 163

Count of 10km squares in the Channel Isles: 0

Atlas Change Index: 0.67

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.