A winter-annual of thin, infertile, drought-prone soils over limestone, sand and gravel; by the sea also in summer-parched cliff-top grasslands. It grows in similar habitats to T. striatum, and frequently grows with it, but tends to occupy rockier, drier and more strongly leached (acidic) microsites. Inland, it is also found on road verges. Lowland.
Coastal populations of T. scabrum are largely stable, while inland losses mainly occurred before 1930 and may have involved casual plants.
Light (Ellenberg): 9
Moisture (Ellenberg): 3
Reaction (Ellenberg): 7
Nitrogen (Ellenberg): 2
Salt Tolerance (Ellenberg): 1
January Mean Temperature (Celsius): 4.5
July Mean Temperature (Celsius): 15.9
Annual Precipitation (mm): 831
Count of 10km squares in Great Britain: 390
Count of 10km squares in Ireland: 12
Count of 10km squares in the Channel Isles: 11
Atlas Change Index: -0.39
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.