An annual of hedge banks, waste places, arable fields and other cultivated ground. Lowland.
A. cynapium was first recorded in Britain by 1597. It was mapped as `all records` in the 1962 Atlas. The current map indicates losses in N. & W. Britain, and in Ireland, where it is thought to be alien (Scannell & Synnott, 1987). The reasons for these losses are unclear, but analysis of the database reveals that most have taken place since 1950. Two subspecies occur in our area: subsp. cynapium occurs throughout the range of the species; subsp. agrestis is probably an archaeophyte and is most frequent on arable land in S. Britain.
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.