A rhizomatous perennial herb of ditches, river banks, Alnus-Salix carr and the margins of canals, reservoirs, lakes and ponds, growing especially well where the water-table fluctuates widely. It prefers slightly drier sites than Glyceria maxima and Phragmites australis, and can occur on roadsides. 0-475 m (Llyn y Figyn, Cards.) and exceptionally at 845 m on Great Dun Fell (Westmorland).
There is no evidence of any change in the distribution of this species since the 1962 Atlas. Its ability to tolerate summer-dry conditions has enabled it to survive in the modern landscape.
Circumpolar Boreo-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.