A perennial herb found mainly on peaty, acidic substrates in, or on the margins of, slow-flowing streams, ditches, pools and the sheltered shores of some larger lakes and tarns, often in seasonally flooded sites. It also occurs in muddy hollows in grasslands and heaths, and the wet floors of disused quarries, sand- and gravel-pits. 0-435 m (Llyn Gwngu, Cards., and Styhead Tarn, Cumberland).
Many of the losses of E. fluitans occurred before 1930, following drainage or the loss of lowland heathland, and this decline has continued in England since the 1962 Atlas. It is better recorded now elsewhere.
Oceanic Southern-temperate element, with a disjunct distribution.
Perennation - primary
Life Form - primary
Clonality - primary
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.