A morphologically variable biennial or perennial tufted herb, which is usually found on limestone rock ledges, screes and pavements, and occasionally in open grassland on thin droughted soils. It also occurs on sand dunes and, more rarely, on base-rich mica-schists and igneous rocks, and on sandstone cliffs. From sea level, but more commonly an upland plant, reaching 1080 m in the Breadalbanes (Mid Perth).
D. incana is much better recorded in its core areas than in the 1962 Atlas. The reason for the apparent loss of outlying sites is unclear.
European Boreo-arctic Montane element; also in N. America.
Height (cm): 35
Perennation - primary
Life Form - primary
Comment on Life Form
Clonality - primary
Count of 10km squares in Great Britain: 225
Count of 10km squares in Ireland: 29
Count of 10km squares in the Channel Isles: 0
Atlas Change Index: -0.75
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
1988. The Irish Red Data Book. 1. Vascular Plants.
1986. Atlas of north European vascular plants north of the Tropic of Cancer. 3 vols.
Jalas & Suominen (1996)
1991. Crucifers of Great Britain and Ireland. Botanical Society of the British Isles Handbook no. 6.