A fern of moist but well-drained acidic to neutral soils of low base content, growing on banks, sea-cliffs and wooded slopes. In the Weald (Sussex) it occurs in deep, steep-sided wooded ravines which emulate its Atlantic habitats. Generally lowland, but reaching 640 m in Macgillycuddy`s Reeks (S. Kerry).
D. aemula is much better recorded than in the 1962 Atlas; it has recently been discovered in the New Forest (S. Hants.) for example. However, it is vulnerable to changes in humidity and clear-felling, and the coppicing of old woodland is responsible for the loss of some populations in the south.
Oceanic Temperate element; confined to the hyperoceanic zone in W. Europe and Macaronesia.
Count of 10km squares in Great Britain: 436
Count of 10km squares in Ireland: 383
Count of 10km squares in the Channel Isles: 0
Atlas Change Index: -0.04
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.