An annual or short-lived perennial herb found in a variety of dry, open habitats. It is most frequent in waste places such as by railways, roads and on tips, but is also found on rocks, cliffs, walls and in gardens. It is occasionally cultivated and ploughed in as a `green manure`. Lowland.
First recorded in 1778 in a field of oats raised from imported seeds from a ship wrecked on the Kent coast, D. muralis has spread steadily, probably bolstered by other accidental introductions. It is still invading rural areas.
Native of C. & S. Europe and N. Africa; naturalised in Europe north of its native range.
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
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.