Trichomanes speciosum (gametophyte)
The gametophyte of T. speciosum grows deep in clefts, crevices and natural rock hollows on a range of acidic to neutral rocks. Such sites are dark (less than 1% ambient light) and are often humid, being located on sea-cliffs, river-cliffs or streamsides, or are kept damp through soil capillary action. 0-530 m (Moel yr Ogof, Caerns.).
Although first described from cultivated material in 1888, the gametophyte was overlooked in the wild until 1989, when it was identified in N. England. Recent fieldwork has revealed an extensive, but still under-recorded, distribution.
Gametophytes occur within the European range of the sporophyte, but also extend eastwards to C. Europe.
Count of 10km squares in Great Britain: 162
Count of 10km squares in Ireland: 62
Count of 10km squares in the Channel Isles: 0
Atlas Change Index: 2.23
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.