Hymenophyllum wilsonii

Tracheophyta PteropsidaHymenophyllaceaeHymenophyllumHymenophyllum wilsonii


A rhizomatous perennial fern, forming dense colonies on a variety of substrates, including sheltered acidic or, rarely, mildly basic rocks, and trees in humid sites. It also occurs on damp upland cliffs, boulder scree and, rarely, old walls. 0-1005 m (Macgillycuddy`s Reeks, S. Kerry).



World Distribution

Oceanic Boreo-temperate element; confined to the hyperoceanic zone of W. Europe and Macaronesia.

Broad Habitats

Light (Ellenberg): 5

Moisture (Ellenberg): 5

Reaction (Ellenberg): 3

Nitrogen (Ellenberg): 3


Salt Tolerance (Ellenberg): 0

January Mean Temperature (Celsius): 3.1

July Mean Temperature (Celsius): 13.1

Annual Precipitation (mm): 1685

Life form information

Height (cm): 10

Perennation - primary


Life Form - primary




Clonality - primary

Rhizome shortly creeping

Distribution information

Count of 10km squares in Great Britain: 577

Count of 10km squares in Ireland: 176

Count of 10km squares in the Channel Isles: 0

Atlas Change Index: -0.87

Weighted Changed Factor: -17

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 (6a)
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.
Richards PW, Evans GB
1972.  Biological Flora of the British Isles. No. 126. Hymenophyllum tunbrigense (L.) Sm. (pp. 245-258), Hymenophyllum wilsonii Hooker (258-268). Journal of Ecology. 60:245-268.