Species: Physcia leptalea
Photos: On coastal Hawthorn twig. Ballyrisode, Cork, SW Ireland.
Light-grey thallus with long, narrow lobes, pseudocyphellate and with prominent cilia. White undersurface with some scattered rhizines. Usually very fertile, dark apothecia with thick, swollen margins, discs often +/- pruinose. Soredia absent.
Often coastal, also found inland in Ireland on well-lit basic-barked and nutrient-rich twigs and branches. Cortex: K+ yellow
Similar: P. tenella and P. adscendens. Sorediate.
Physcia leptalea on coastal Hawthorn. January 2009