The descriptive text, below the map, is from the Cornish Red Data Book (2009). The map on this web page depicts the organisms distribution and shows the records made pre-2000 and those made since.
Range & Status
Preferring to grow on sheltered, rather shaded, trunks of old Oak Quercus spp. in ancient woodland. A locally frequent species which is recorded from east Cornwall, the New Forest, north Wales and south-west Scotland. Elsewhere it is known from Ireland, extending south to Spain. It is frequent in the New Forest but very rare elsewhere. In Cornwall it occurs on old parkland Oaks at Boconnoc and Lanhydrock estates.
I.J. Bennallick, S. Board, C.N. French, P.A. Gainey, C. Neil, R. Parslow, A. Spalding and P.E. Tompsett. eds. 2009. Red Data Book for Cornwall and the Isles of Scilly. 2nd Edition.Croceago Press.
The Cornish Red Data Book Project was led by the Cornwall and Isles of Scilly Federation for Biological Recorders (CISFBR). The full text and species accounts (minus the maps) are available on the CISFBR website.