A procumbent winter-annual found near the coast in open grassland or heathland on thin, free-draining neutral to acidic sands, gravels and shingle; inland it occurs in summer-parched grasslands on chalk and limestone. Lowland.
Many inland sites for T. subterraneum were lost in the 19th and early 20th centuries, but since 1930 its distribution seems to have remained fairly stable. Robust alien variants were frequently recorded as casuals introduced with wool shoddy.
Submediterranean?Subatlantic element; widely naturalised outside its native range.
Count of 10km squares in Great Britain: 337
Count of 10km squares in Ireland: 1
Count of 10km squares in the Channel Isles: 13
Atlas Change Index: -0.1
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.