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.

Ramonia dictyospora - a lichen

Range & Status

This rare and endemic species seems to have a preference for the dry, disintegrating heartwood of various deciduous trees. Recently (2009) found on Ash Fraxinus excelsior on the Combined Universities in Cornwall campus at Tremough near Penryn. Elsewhere it is recorded from Hampshire and Oxfordshire in Southern England and also from Scotland. Ramonia dictyospora is a UK Priority List (BAP) 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.