Carex lasiocarpa

Tracheophyta MagnoliopsidaCyperaceaeCarexCarex lasiocarpa


This rhizomatous perennial grows in reed-swamps and other vegetation at the edges of lakes, pools and slow-flowing streams and rivers, and in flushes and wet hollows in fens; it can also colonise old peat workings and drainage channels. It generally occurs in nutrient-poor water, which may be base-rich or base-poor. 0-650 m (E. of Beinn Heasgarnich, Mid Perth).



World Distribution

Circumpolar Boreal-montane element.

Broad Habitats

Fen, marsh and swamp (not wooded)

Light (Ellenberg): 8

Moisture (Ellenberg): 10

Reaction (Ellenberg): 6

Nitrogen (Ellenberg): 3


Salt Tolerance (Ellenberg): 0

January Mean Temperature (Celsius): 3.1

July Mean Temperature (Celsius): 13.6

Annual Precipitation (mm): 1383

Life form information

Height (cm): 120

Perennation - primary


Life Form - primary

Perennial hydrophyte (perennial water plant)

Life Form - secondary




Clonality - primary

Rhizome far-creeping

Count of 10km squares in Great Britain: 461

Count of 10km squares in Ireland: 169

Count of 10km squares in the Channel Isles: 0

Atlas Change Index: 0.73

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 (361c)
Atlas of north European vascular plants north of the Tropic of Cancer. 3 vols,
Hultén, E., and Fries M.
, Königstein, (1986)

Sedges of the British Isles. Botanical Society of the British Isles Handbook no. 1, edn 2,
Jermy, A. C., Chater A. O., and David R. W.
, London, (1982)

Aquatic plants in Britain and Ireland,
Preston, C. D., and Croft J. M.
, Colchester, (1997)