Asplenium marinum

Tracheophyta PteropsidaAspleniaceaeAspleniumAsplenium marinum


An evergreen perennial fern, predominantly found in cool, moist crevices and fissures in maritime cliffs, and often within range of sea-spray. It occasionally grows on walls in coastal areas, but, because of its requirement for a frost-free environment, it is only exceptionally found on rocks inland. Lowland.



World Distribution

Suboceanic Southern-temperate element.

Asplenium marinum, on the Oa, Islay (v.c. 102)
© O.L. Pescott

Broad Habitats

Supralittoral rock (does not include maritime grassland)

Light (Ellenberg): 9

Moisture (Ellenberg): 6

Reaction (Ellenberg): 5

Nitrogen (Ellenberg): 5


Salt Tolerance (Ellenberg): 3

January Mean Temperature (Celsius): 4.4

July Mean Temperature (Celsius): 14

Annual Precipitation (mm): 1261

Life form information

Height (cm): 35

Perennation - primary


Life Form - primary




Clonality - primary

Little or no vegetative spread

Distribution information

Count of 10km squares in Great Britain: 530

Count of 10km squares in Ireland: 172

Count of 10km squares in the Channel Isles: 12

Atlas Change Index: 0.02

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 (8a)
Hultén E, Fries M
1986.  Atlas of north European vascular plants north of the Tropic of Cancer. 3 vols.
Jalas & Suominen (1972)
Bangerter EB, Cannon JFM, Jermy AC
1978.  Ferns and their allies. The Island of Mull: a survey of its flora and environment. :12.1-12.7.
Page CN
1997.  The ferns of Britain and Ireland, edn 2.