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
A small epiphytic species on crustose corallines and ma\'ebrl Phymatolithon calcareum , also epilithic on muddy bedrock and pebbles. Often growing amongst other turf-forming algae, from extreme low water to a depth of about 10m on moderately exposed to extreme wave-sheltered coasts, often with strong current action. Known from scattered localities in south-west Britain, Cornwall, south and north Devon, south Wales and western 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.