Carex nigra

Tracheophyta MagnoliopsidaCyperaceaeCarexCarex nigra

Ecology

C. nigra occurs in a wide range of wet habitats, avoiding only those which are extremely basic or acidic. It is found in fens, fen-meadows, bogs, streamsides and flushes, wet grassland and dune-slacks. This sedge is morphologically very variable: tussock forms may occur in stagnant, acidic sites, and rhizomatous tufted variants are known from calcareous mires. 0-1005 m (Beinn Heasgarnich, Mid Perth).

Status

Native

World Distribution

Eurosiberian Boreo-temperate element; also in N. America.

Broad Habitats

Fen, marsh and swamp (not wooded)

Light (Ellenberg): 7

Moisture (Ellenberg): 8

Reaction (Ellenberg): 4

Nitrogen (Ellenberg): 2

Salt Tolerance (Ellenberg): 0

January Mean Temperature (Celsius): 3.5

July Mean Temperature (Celsius): 14.3

Annual Precipitation (mm): 1131

Height (cm): 70

Perennation - primary

Perennial

Life Form - primary

Hemicryptophyte

Woodiness

Herbaceous

Clonality - primary

Rhizome far-creeping

Count of 10km squares in Great Britain: 2582

Count of 10km squares in Ireland: 876

Count of 10km squares in the Channel Isles: 5

Atlas Change Index: -0.01

Weighted Changed Factor: -11

Weighted Change Factor Confidence (90%)

15

JNCC Designations

NBNSYS0000002460