Catapodium marinum

Tracheophyta MagnoliopsidaPoaceaeCatapodiumCatapodium marinum


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.



World Distribution

Mediterranean-Atlantic element.

© G. Toone, IWNHAS

Broad Habitats

Supralittoral rock (does not include maritime grassland)

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

Life form information

Height (cm): 25

Perennation - primary


Life Form - primary

Therophyte (annual land plant)



Clonality - primary

Little or no vegetative spread

Distribution information

Count of 10km squares in Great Britain: 463

Count of 10km squares in Ireland: 172

Count of 10km squares in the Channel Isles: 14

Atlas Change Index: 0.52

Weighted Changed Factor: 28

Weighted Change Factor Confidence (90%)


Distribution information

JNCC Designations


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

Atlas (379b)