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
In Britain this species is known from only two sites, both on the Land' s End Peninsula. Elsewhere it has a scattered distribution in central Europe. At its Cornish sites, one of which is a SSSI, P. sudetica grows on soil, mosses and plant debris on metal-rich spoil from old mine workings. The main threat to this species is the landscaping of derelict mine sites. Apparently this lichen has not been recorded from these sites for some time and survey work should be undertaken to refind it, to estimate its population size, and any potential threats.
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.