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
On steeply inclined to vertical rock faces on moderately and fully exposed headlands on the open coast. The voucher specimen for this species is from Porthquin, north Cornwall. A southern and south-western species in the British Isles, it has recently also been recorded from around various islands on the west coast of England, including the Isles of Scilly. Elsewhere known from south Devon, the Isle of Wight, the Isle of Man, south-west and north-west Wales and south-west Ireland.
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.