In coastal areas this perennial herb occurs in the uppermost parts of saltmarshes, in rough grassland in drained estuarine marshes, by brackish dykes and the lower reaches of tidal rivers. Inland, it is found in base-enriched habitats, including marshes, fen-meadows and tall-herb fen. Lowland.
O. lachenalii is still widespread and locally plentiful, especially around the coast, but inland sites have been lost to drainage and land-fill. It was mapped as `all records` in the 1962 Atlas.
Suboceanic Southern-temperate element.
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.