An annual of grasslands, hedge banks, waysides and waste ground, and a common weed of flower borders, allotments and arable fields. Generally lowland, but reaching 380 m at Braemar (S. Aberdeen).
There appears to have been little change in the range of G. dissectum since the 1962 Atlas, although it is now recorded from many more squares. Its ability to thrive in disturbed, nutrient-enriched habitats makes it likely that this species is becoming more abundant in many areas.
As an archaeophyte G. dissectum has a European Southern-temperate distribution; it is widely naturalised outside 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.