Cornish Biodiversity Network  -  Supporting Wildlife Recording

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Cornish Red Data (2009)

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.

Bryum dyffrynense

Range & Status

Described new to science from the coast of Wales (Holyoak, 2003b), with other records from coastal sites in Cumbria, N. and W. Ireland, E. Kent, NW. France and Belgium.

Regional Distribution

Known only from a disused sand pit at Phillack Towans.

Habitat & Ecology

The Cornish population grows on damp, partly bare, unshaded, calcareous sand in a disused sand quarry near the landward edge of the dunes. Elsewhere it is known mainly from coastal dune-slacks.


Vegetation succession at the Phillack Towans sand pit may eventually result in loss of all habitat for the species at that locality.



Click here to see Dr. David Holyoak's Bryophyte Flora for this species


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.