A fleshy perennial herb of spray-drenched rock crevices and ledges on sea-cliffs, coastal rocks and on stabilised shingle; also in maritime grassland and artificial habitats like harbour walls and stone sea defences. It appears indifferent to soil reaction, being found on many rock types from chalk and limestone to granite. Lowland.
There has been no appreciable change in the distribution of C. maritimum since the 1962 Atlas.
Light (Ellenberg): 9
Moisture (Ellenberg): 6
Reaction (Ellenberg): 7
Nitrogen (Ellenberg): 5
Salt Tolerance (Ellenberg): 5
January Mean Temperature (Celsius): 5.1
July Mean Temperature (Celsius): 15.4
Annual Precipitation (mm): 1042
Count of 10km squares in Great Britain: 301
Count of 10km squares in Ireland: 138
Count of 10km squares in the Channel Isles: 14
Atlas Change Index: 0.23
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
Flora dels Països Catalans, II. Crucíferes-Amarantàcies,
, Barcelona, (1990)
An experimental investigation into the ecology of some maritime cliff species I. Field observations,
, Journal of Ecology, Volume 67, p.283-292, (1979)
Umbellifers of the British Isles. Botanical Society of the British Isles Handbook no. 2,
, London, (1980)