A perennial herb growing on exposed mud at the shallow edge of still or slow-flowing waters, or in marshes and swamps. It is confined to mesotrophic or eutrophic habitats. Plants fruit prolifically, and the species is a frequent colonist of newly cleaned ditches and recently flooded mineral workings. Generally lowland, but reaching 405 m at Dock Tarn (Cumberland).
A well-recorded species with a distribution which is similar to that in the 1962 Atlas.
Circumpolar Wide-temperate element; widely naturalised outside its native range.
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
Comparative Plant Ecology,
, London, (1988)
Atlas of north European vascular plants north of the Tropic of Cancer. 3 vols,
, Königstein, (1986)
Vergleichende Chorologie der zentraleuropäischen Flora. Volume 1. 2 vols,
, Jena, (1965)
Aquatic plants in Britain and Ireland,
, Colchester, (1997)