An annual of dry bare places by the sea, rock crevices, grassy banks, cliff-tops, sand dunes and stabilised shingle; also in artificial habitats such as walls and pavements, and increasingly inland by salt-treated roads. Lowland.
There has been little change in the distribution of C. marinum since the 1962 Atlas, apart from its recent colonisation of roadsides near the coast, mainly in S. England and along the M4 motorway in S. Wales. It was first recorded in that habitat in the mid-1980s, though only since the mid-1990s has it begun to spread appreciably.
Light (Ellenberg): 9
Moisture (Ellenberg): 5
Reaction (Ellenberg): 7
Nitrogen (Ellenberg): 3
Salt Tolerance (Ellenberg): 3
January Mean Temperature (Celsius): 4.8
July Mean Temperature (Celsius): 15.1
Annual Precipitation (mm): 1027
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.
Atlas text references