A perennial herb found in a range of woodland types. It is most frequent in densely shaded Fagus woods, particularly those on `clay-with-flints` deposits, but is also found on calcareous, and occasionally acidic, sands and clays in mixed woodland and coppices of Corylus and Carpinus. Lowland.
Woodland clearance caused a decline in E. purpurata before 1930, and this may have continued (to a lesser degree) since the 1962 Atlas. It is easily overlooked, however, and is now much better recorded. It requires a particular level of shade; it has increased in Hertfordshire due to a cessation of coppicing.
European Temperate element.
Count of 10km squares in Great Britain: 235
Count of 10km squares in Ireland: 0
Count of 10km squares in the Channel Isles: 0
Atlas Change Index: -0.08
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
1981. The Hertfordshire Orchidaceae. Transactions of the Hertfordshire Natural History Society. 28(4):56-79.
1986. Atlas of north European vascular plants north of the Tropic of Cancer. 3 vols.
1991. Wild orchids of Dorset.
1991. The orchids of Suffolk.