An annual or bennial herb of dry, infertile calcareous or base-rich substrates, but also found in flushed sites on neutral or mildly acidic soils. It occurs in a wide range of calcareous grasslands, mires and flushes, in short-sedge fen-meadows, on outcrops and ledges of basic rock, road cuttings, quarry spoil and lead-mine debris, and very locally on dry heaths. 0-840 m (Breadalbanes, Mid Perth).
L. catharticum was mapped as `all records` in the 1962 Atlas. It has probably declined in many areas, particularly in S. England where local losses are beginning to show at the 10-km square scale.
European Temperate element; also in N. America.
Light (Ellenberg): 8
Moisture (Ellenberg): 5
Reaction (Ellenberg): 7
Nitrogen (Ellenberg): 2
Salt Tolerance (Ellenberg): 0
January Mean Temperature (Celsius): 3.5
July Mean Temperature (Celsius): 14.4
Annual Precipitation (mm): 1113
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.