Order: Peltigerales       Family: Collemataceae Species: Leptogium brebissonii Growth type: Foliose. Photos: Glengarrif woods, Cork, SW Ireland and Dunans, Scotland Thank you to Andy Acton for the photograph immediately below Rounded lobes that are much swollen when wet, green-black to brownish-black and dark-grey, flattened and ridged when dry. The lower surface is not tomentose. Brownish isidia are coralloid or flattened, but apothecia are absent. West of Ireland on mossy rocks and damp, deciduous trees. Chemical reactions negative. Very similar: Leptogium coralloideum

Leptogium brebissonii December 2009 and March 2013