A perennial herb of moist, base-rich, sometimes clayey, soils in deciduous or mixed woodlands, often found near streams or seepages. It occurs most frequently in clearings and along tracks, but is sometimes found in considerable shade. Lowland.
C. strigosa is easily overlooked, and it is better recorded now than in the 1962 Atlas. Many sites were lost before 1930, particularly in Ireland. Since 1962 its distribution has been stable other than in Sussex and Kent, where there has been a noteworthy decline, the reasons for which are unclear.
Suboceanic 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.