This perennial herb is restricted to habitats at the water`s edge, where potential competitors are restricted by fluctuating water levels, disturbance or moderate exposure. It usually grows in mildly to strongly calcareous or brackish waters, over a range of organic or inorganic substrates. 0-320 m (W. of Libanus, Brecs.).
The decline of B. ranunculoides was already apparent in the 1962 Atlas, and can be attributed to the destruction of small waters and the colonisation of others by more competitive species once grazing ceases. Since then it has declined further in England but seems stable in the west of its range.
Suboceanic Southern-temperate element.
Height (cm): 20
Perennation - primary
Life Form - primary
Clonality - primary
Clonality - secondary
Comment on Clonality
Count of 10km squares in Great Britain: 536
Count of 10km squares in Ireland: 344
Count of 10km squares in the Channel Isles: 6
Atlas Change Index: -1.08
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.