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

Height (cm): 15

Perennation - primary


Life Form - primary

Therophyte (annual land plant)



Clonality - primary

Little or no vegetative spread

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%)


JNCC Designations


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.