A strong, rhizomatous perennial herb growing in dense stands in fens, marshes, wet meadows, ditches and by water, usually in more base-rich conditions than any of the other jointed-rushes (sect. Septati); it also sometimes occurs in brackish water. Lowland.
J. subnodulosus has been lost from many sites in S. England both before 1930 and subsequently, because of drainage of its habitat. However, it is now known to be more frequent in Wales than was suspected. This species is very distinct from other jointed-rushes and the map should indicate its true distribution.
European 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.
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.
Richards & Clapham (1941e)