Schoenoplectus lacustris

Tracheophyta MagnoliopsidaCyperaceaeSchoenoplectusSchoenoplectus lacustris


A tall rhizomatous perennial herb of standing or flowing fresh water, in conditions ranging from eutrophic and base-rich to oligotrophic and base-poor. Substrates include silt, clay, peat or gravel. It occurs in ponds, lakes, canals, dykes and slow moving rivers, usually in water 0.3-1.5 m deep, but can also be found in deeper water. Generally lowland, but reaching 405 m at Dock Tarn (Cumberland).



World Distribution

Eurosiberian Wide-temperate element.

Broad Habitats

Light (Ellenberg): 8

Moisture (Ellenberg): 11

Reaction (Ellenberg): 7

Nitrogen (Ellenberg): 6


Salt Tolerance (Ellenberg): 0

January Mean Temperature (Celsius): 3.7

July Mean Temperature (Celsius): 14.9

Annual Precipitation (mm): 1013

Length: 210

Perennation - primary


Life Form - primary

Perennial hydrophyte (perennial water plant)



Clonality - primary

Rhizome shortly creeping

Distribution information

Count of 10km squares in Great Britain: 1202

Count of 10km squares in Ireland: 535

Count of 10km squares in the Channel Isles: 0

Atlas Change Index: 0.47

Weighted Changed Factor: 0

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.

Atlas text references

Atlas (348d)
Hultén E, Fries M
1986.  Atlas of north European vascular plants north of the Tropic of Cancer. 3 vols.
Preston CD, Croft JM
1997.  Aquatic plants in Britain and Ireland.