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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.

Heterodermia speciosa

Range & Status

Previously named H. isidophora this species is found on, and between, various moss species growing between serpentine rocks on south-facing slopes. A very rare species recorded only from the Lizard Peninsula, and possibly a few 19th Century records from S.W. Ireland, but nowhere else in Europe. Otherwise recorded from Central and South America, Africa and Asia. The sites at Kynance Cove and Gew Graze nearby, both lie within a SSSI where, however, it is constantly threatened by encroachment from Ivy Hedera helix , Bramble Rubus fruticosus agg., Bracken Pteridium aquilinum and Blackthorn Prunus spinosa which need regular pruning.


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.