A rhizomatous perennial herb which grows as floating mats at the edges of lakes and ponds, or rooted in marshes and wet Alnus woodland. Reproduction is vegetative by rhizome fragments; seeds are produced in Britain (and avidly eaten by ducks) but details of germination are unknown. Lowland.
C. palustris was cultivated in Britain by 1738. It was planted at Black Pond (Surrey) in 1861, and persisted for at least 30 years. Another population in Surrey, at Bolder Mere, persisted for over 60 years. It is better recorded now than when mapped by Preston & Croft (1997).
C. palustris has a Circumpolar Boreal-montane distribution; it is, however, virtually absent as a native from the Oceanic zone in Europe.
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.