Asplenium marinum (Sea Spleenwort)


Summary Information


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.


Photos Information


Habitats Information

Broad Habitats

Supralittoral rock (does not include maritime grassland)

Light (Ellenberg): 9 Information

Moisture (Ellenberg): 6 Information

Reaction (Ellenberg): 5 Information

Nitrogen (Ellenberg): 5 Information

Salt Tolerance (Ellenberg): 3 Information

January Mean Temperature (Celsius): 4.4 Information

July Mean Temperature (Celsius): 14 Information

Annual Precipitation (mm): 1261 Information

Life Form

Life Form Information

Height (cm): 35

Perennation - primary


Perennation - secondary

Life Form - primary


Life Form - secondary



Clonality - primary

Little or no vegetative spread

Clonality - secondary


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%)


Conservation Status

Conservation Status Information

Plantatt Conservation Status

Other Accounts

Other Accounts Information


References Information

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.