A perennial herb of short unimproved turf on well-drained calcareous soils, predominantly on chalk and limestone, but also on sand dunes and machair. In Scotland, it also grows on Old Red Sandstone sea-cliffs and on mica-schist. 0-710 m (Meall an Daimh, E. Perth).
A. danicus showed only a modest loss, mainly in Gloucestershire and Yorkshire, before 1930. Since then it has declined substantially on the chalk in S. England and limestone in N.E. England, largely due to agricultural improvement or lack of grazing. It is stable elsewhere.
Circumpolar Temperate element, with a continental distribution in W. Europe and absent from eastern N. America.
Light (Ellenberg): 8
Moisture (Ellenberg): 3
Reaction (Ellenberg): 8
Nitrogen (Ellenberg): 2
Salt Tolerance (Ellenberg): 0
January Mean Temperature (Celsius): 3.3
July Mean Temperature (Celsius): 14.8
Annual Precipitation (mm): 745
Count of 10km squares in Great Britain: 242
Count of 10km squares in Ireland: 3
Count of 10km squares in the Channel Isles: 0
Atlas Change Index: -0.88
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.