Lichen: Degelia plumbea
Name: Degelia plumbea (Lightf.) P.M.Jørg. & P.James (1990)
Pronunciation: Degelia plumbea
Conservation Evaluation: Least Concern, International Responsibility.
Body Type: Foliose
Description: The thallus is large (up to 10cm diameter) with a distinctive blue-grey colour. The marginal lobes have crescent-shaped rings that look superficially like growth rings. The underside has a well developed hypothallus that appears ‘furry’ and protrudes just beyond the margin of the uppersurface. There are no isidia. The brown-red apothecia (=< 1mm diameter) are usually abundant, especially towards the centre of the thallus.
Chemical Tests: All negative
Nature Notes: Likes well lit areas of woodland and scrub. Found on basic bark, typically on hazel in the West of Ireland. Sometimes found near the sea on silica-poor rocks. Similar looking species are Degelia atlantica and Pannaria rubiginosa.
Vice County Distribution: See map.
Link: Map this species on the Lichen Survey
Other Degelia recorded in Ireland:
- Degelia atlantica (Degel.) P.M.Jorg. & P.James
- Degelia ligulata P.M.Jorg. & P.James
Text and images © Paul Whelan, 2009.