Asplenium trichomanes

Tracheophyta PteropsidaAspleniaceaeAspleniumAsplenium trichomanes


A perennial, evergreen fern which grows in a range of rocky habitats, including cliffs, rock faces, screes, mine waste and, perhaps now most commonly, on walls. 0-870 m (Macgillycuddy`s Reeks, S. Kerry).



World Distribution

Circumpolar Southern-temperate element, with a disjunct distribution.

© P. Shannon

Broad Habitats

Light (Ellenberg): 5

Moisture (Ellenberg): 3

Reaction (Ellenberg): 8

Nitrogen (Ellenberg): 2

Salt Tolerance (Ellenberg): 0

January Mean Temperature (Celsius): 3.6

July Mean Temperature (Celsius): 14.5

Annual Precipitation (mm): 1121

Height (cm): 35

Perennation - primary


Life Form - primary




Clonality - primary

Little or no vegetative spread

Count of 10km squares in Great Britain: 2294

Count of 10km squares in Ireland: 911

Count of 10km squares in the Channel Isles: 12

Atlas Change Index: 0.07

Weighted Changed Factor: -2

Weighted Change Factor Confidence (90%)


JNCC Designations


Atlas text references

Atlas (8b)
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.
Meusel H, Jäger E, Weinert E
1965.  Vergleichende Chorologie der zentraleuropäischen Flora. Volume 1. 2 vols.
Page CN
1997.  The ferns of Britain and Ireland, edn 2.