A tussock-forming perennial of calcareous and other base-rich fens (especially near springs), and of peaty flushes, marshes, bogs, dune-slacks, sea-cliff flushes, and the upper fringes of saltmarshes where there is base-rich flushing. In W. Ireland, it is frequent on acid blanket-bog. Generally lowland, but reaching 550 m in the Mourne Mountains (Co. Down).
S. nigricans had widely declined in lowland sites before 1930, and this loss has continued outside its core areas. Its distribution is stable near the western coasts of Britain and in Ireland.
Eurosiberian Southern-temperate element; also in N. America.
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.
Atlas text references
1986. Atlas of north European vascular plants north of the Tropic of Cancer. 3 vols.
1965. Vergleichende Chorologie der zentraleuropäischen Flora. Volume 1. 2 vols.
1968. Biological Flora of the British Isles. No. 114. Schoenus nigricans L. (Chaetospora nigricans Kunth). Journal of Ecology. 56:883-899.