A deciduous or evergreen fern found in deciduous woodland, along rides in coniferous plantations, in ditches, on shady banks and road verges, usually on acidic substrates. In more oceanic areas, it grows in the open on well-drained W.- or S.W.-facing hillsides, scree slopes and mountain ledges. It is also found on brickwork in urban areas. 0?705 m (Little Dun Fell, Westmorland).
D. affinis was greatly under-recorded in the 1962 Atlas but its distribution is probably stable. The three subspecies recognised by Stace (1997) are difficult to identify and are poorly recorded; they are not mapped here.
European 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.