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.

Usnea subscabrosa - a lichen

Range & Status

A yellow-green fruticose lichen found growing on granitic rocks and amongst low Ling Calluna vulgaris vegetation. In Britain it is so far known only from St. Agnes in the Isles of Scilly, where it is said to be locally frequent and occurs within a SSSI. Elsewhere it is found in Portugal, Macrosnesia and the eastern USA. Populations growing amongst the heather are prone to periodic heathland fires.


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.