Order: Peltigerales       Family: Collemataceae Species: Leptogium juressianum Growth type foliose. Identified by John Douglass Photos: On mossy rock. Killarney National Park, Co. Kerry, Ireland Loosely attached, cushion-forming thallus with thin brown-olive lobes (blue-grey when dry) partially covered with +/- dense grey-white tomentum. Marginal or laminal granular or sub-lobate isidia, apothecia and pycnidia unknown. Rare in old woodlands on shaded mossy trunks of Oak and Birch, rarely on mossy rocks. Hyperoceanic species, most Irish records are from Co. Cork and Co. Kerry, absent from UK and Scotland. Similar: Leptogium lichenoides and Leptogium gelatinosum

Immediately above: Leptogium juressianum, Co. Cork. March 2010. Identified by Andy Acton