Catapodium rigidum

Tracheophyta MagnoliopsidaPoaceaeCatapodiumCatapodium rigidum


An annual of dry, barish places on sandy banks, stabilised shingle and around rock outcrops, usually preferring calcareous substrates; also in artificial habitats such as quarries, walls, pavements and railway ballast. 0-355 m (Llangollen, Denbs.).



World Distribution

Submediterranean-Subatlantic element.

© P. Shannon

Broad Habitats

Light (Ellenberg): 8

Moisture (Ellenberg): 3

Reaction (Ellenberg): 7

Nitrogen (Ellenberg): 2


Salt Tolerance (Ellenberg): 0

January Mean Temperature (Celsius): 4.1

July Mean Temperature (Celsius): 15.5

Annual Precipitation (mm): 878

Life form information

Height (cm): 15

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: 1216

Count of 10km squares in Ireland: 494

Count of 10km squares in the Channel Isles: 10

Atlas Change Index: 0.35

Weighted Changed Factor: 27

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 (379a)
Atlas Supp (149a)
Clark SC
1974.  Biological Flora of the British Isles. No. 136. Catapodium rigidum (L.) C. E. Hubbard. Journal of Ecology. 62:937-958.
Grime JP, Hodgson JG, Hunt R
1988.  Comparative Plant Ecology.
Meusel H, Jäger E, Weinert E
1965.  Vergleichende Chorologie der zentraleuropäischen Flora. Volume 1. 2 vols.