An annual found in a wide range of dry, sparsely vegetated habitats, including open grassland, sunny banks, sea walls, cliff-tops, arable fields, tracks and waste ground; occasionally in disused sand- and gravel-pits, and on rubbish tips. Lowland.
T. nodosa has declined since the 1962 Atlas in many inland areas, although it can be locally very abundant (Green et al., 1997). It is stable at most of its coastal sites, or even increasing, as in Dorset.
Mediterranean-Atlantic element, but naturalised north of its native range so that distribution is now Submediterranean-Subatlantic.
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.