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
Native. European Southern-temperate species. Scattered along the southern coast of Britain, west Wales and the Channel Islands. There are many introduced sites elsewhere in southern Britain.
Mainly scattered around the coast, west of a line from Padstow (SW97) to Dodman Point (SX03). It has been introduced to one site on the Isles of Scilly as well as a number in Cornwall.
Habitat & Ecology
Still surviving in a number of coastal localities, in marshes and cliff-flushes and a wet
A number of sites have been lost due to drainage and this remains the main threat.
Few of the sites are protected.
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.