Irish lichens
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Order: Lecanorales
Family: Parmeliaceae
Species: Parmeliopsis ambigua Q Photos: On ornamental Prunus. Ballineen, Cork, SW Ireland. Identification very uncertain, photographs are probably Hypotrachyna revoluta Thallus to 4cm diameter with flat, adpressed lobes, yellow-grey or greenish when wet. Lobe tips and centre of thallus become covered with powdery soredia. Underside black in centre with simple rhizines, light brown at the lobe tips without rhizines. Apothecia rare. Occurs on acid-barked trees, wood, rocks but declining due to lower SO2 levels. Cortex: K+ very pale yellow, KC +/- yellow. Medulla: UV+ white |
Ballineen, Co.Cork. January 2009