Carex acuta

Tracheophyta MagnoliopsidaCyperaceaeCarexCarex acuta

Ecology

A rhizomatous perennial of shallow water or wet ground at the edges of rivers, streams, canals, lakes and ponds, in swamps, ditches and unimproved flood meadows and in marshland. It usually grows in calcareous and mesotrophic or eutrophic conditions, in areas subject to frequent flooding. It is shade-tolerant and sometimes grows under riverside trees or in wet woodland. Lowland, but formerly at 335 m at Greystoke (Cumberland).

Status

Native

World Distribution

Eurosiberian Boreo-temperate element.

Broad Habitats

Fen, marsh and swamp (not wooded)

Light (Ellenberg): 7

Moisture (Ellenberg): 9

Reaction (Ellenberg): 7

Nitrogen (Ellenberg): 5

Salt Tolerance (Ellenberg): 0

January Mean Temperature (Celsius): 3.5

July Mean Temperature (Celsius): 15.5

Annual Precipitation (mm): 830

Height (cm): 120

Perennation - primary

Perennial

Life Form - primary

Hemicryptophyte

Life Form - secondary

Perennial hydrophyte (perennial water plant)

Woodiness

Herbaceous

Clonality - primary

Rhizome far-creeping

Count of 10km squares in Great Britain: 707

Count of 10km squares in Ireland: 87

Count of 10km squares in the Channel Isles: 0

Atlas Change Index: -0.46

Weighted Changed Factor: 26

Weighted Change Factor Confidence (90%)

52

JNCC Designations

NBNSYS0000002457