Latin name: Homonallium incurvatum
Incurved feather-moss is a moss of moderately shaded, base-rich rocks in humid but not wet environments. This species appears to prefer growing close to ground level amongst sparse vegetation, sometimes on rocks in drystone walls, in woodland or occasionally on rocky crag ledges.
This nationally rare species has its stronghold in northern England. A significant proportion of the known UK population of this moss occurs in the Yorkshire Dales National Park on walls and boulders on woodland edges. There are historical records for six areas in the Yorkshire Dales National Park including Ingleton, Ingleborough and Austwick in the South West of the Park and Askrigg, Aysgarth and East Witton in Wensleydale in the North East of the Park. However many of these records are very old. Tom Blockeel of the British Bryological Society (BBS) carried out a survey in 2006. Members of the Yorkshire Dales Biodiversity Forum, the BBS and other local naturalists are planning further surveys to aid the conservation of this species.
Incurved feather-moss is a nationally rare bryophyte, its status on the threatened bryophyte database is critically endangered, and consequently it is a UKBAP priority species. Each population is vulnerable to local extinction through disturbance to walls or excessive shading. However, the evidence for a decline in recent decades is inconclusive, and the species may be under-recorded.