Potamogeton nodosus

Tracheophyta MagnoliopsidaPotamogetonaceaePotamogetonPotamogeton nodosus

Ecology

This rhizomatous perennial herb is confined to a few calcareous and moderately eutrophic rivers. It grows in shallow or fairly deep water, apparently preferring gravelly substrates and avoiding soft clays. It reproduces vegetatively but does not fruit in Britain. Lowland.

Status

Native

World Distribution

Circumpolar Southern-temperate element.

Broad Habitats

Rivers and streams

Light (Ellenberg): 6

Moisture (Ellenberg): 12

Reaction (Ellenberg): 8

Nitrogen (Ellenberg): 5

Salt Tolerance (Ellenberg): 0

January Mean Temperature (Celsius): 3.9

July Mean Temperature (Celsius): 16.4

Annual Precipitation (mm): 761

Length: 250

Perennation - primary

Perennial

Life Form - primary

Perennial hydrophyte (perennial water plant)

Woodiness

Herbaceous

Clonality - primary

Irregularly fragmenting (mainly water plants)

Clonality - secondary

Rhizome far-creeping

Count of 10km squares in Great Britain: 15

Count of 10km squares in Ireland: 0

Count of 10km squares in the Channel Isles: 0

Atlas Change Index: -0.18

JNCC Designations

NHMSYS0000461996