Hymenophyllum tunbrigense

Tracheophyta PteropsidaHymenophyllaceaeHymenophyllumHymenophyllum tunbrigense


A rhizomatous perennial fern of very sheltered, often deeply shaded, humid habitats; these include acidic rock faces, humic banks and tree trunks, particularly in deep stream valleys, and crevices on upland boulder scree. 0-760 m (Galtee Mountains, Co. Tipperary).



World Distribution

Oceanic Temperate element; also one site in N. America.

Broad Habitats

Inland rock (quarries, cliffs, screes)

Light (Ellenberg): 4

Moisture (Ellenberg): 6

Reaction (Ellenberg): 2

Nitrogen (Ellenberg): 3


Salt Tolerance (Ellenberg): 0

January Mean Temperature (Celsius): 3.8

July Mean Temperature (Celsius): 14

Annual Precipitation (mm): 1567

Life form information

Height (cm): 8

Perennation - primary


Life Form - primary




Clonality - primary

Rhizome shortly creeping

Count of 10km squares in Great Britain: 197

Count of 10km squares in Ireland: 112

Count of 10km squares in the Channel Isles: 0

Atlas Change Index: -0.54

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 (5d)
Atlas of north European vascular plants north of the Tropic of Cancer. 3 vols,
Hultén, E., and Fries M.
, Königstein, (1986)

Jalas & Suominen (1972)
Ferns and their allies,
Bangerter, E. B., Cannon J. F. M., and Jermy A. C.
, The Island of Mull: a survey of its flora and environment, London, p.12.1-12.7, (1978)

Vergleichende Chorologie der zentraleuropäischen Flora. Volume 1. 2 vols,
Meusel, H., Jäger E., and Weinert E.
, Jena, (1965)

The ferns of Britain and Ireland, edn 2,
Page, C. N.
, Cambridge, (1997)

Tunbridge Filmy-fern, Hymenophyllum tunbrigense (Hymenophyllaceae: Pteridophyta), in South-East England in 1994/1995,
Rich, T. C. G., Richardson S. J., and Rose F.
, Fern Gazette, Volume 15, p.51-63, (1995)

Biological Flora of the British Isles. No. 126. Hymenophyllum tunbrigense (L.) Sm. (pp. 245-258), Hymenophyllum wilsonii Hooker (258-268),
Richards, P. W., and Evans G. B.
, Journal of Ecology, Volume 60, p.245-268, (1972)