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

JNCC Designations