This perennial herb is known only from the northern half of Lough Derg, where it has been recorded along the limestone shoreline and on the islands, occupying an intermediate, stony habitat between the flood level and the surrounding scrub. Lowland.
Populations of I. salicina have progressively declined. It disappeared from the S.E. Galway side of Lough Derg in the 1960s and there is now only one population in N. Tipperary. Its decline has been tentatively attributed to increased eutrophication of the lake and lake shore. It has been transplanted to one former native site.
Eurasian Temperate element, with a continental distribution in W. Europe.
Count of 10km squares in Great Britain: 0
Count of 10km squares in Ireland: 3
Count of 10km squares in the Channel Isles: 0
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.