Fuscidea oceanica

Fuscidea oceanica is unusual in regularly producing both sexual and asexual propagules. It is the only sorediate member of the genus occurring in the British Isles that is also usually fertile, however, as the soredia of F. oceanica are very small and inconspicuous and are easily overlooked, so are easily overlooked. It is locally common on exposed, hard acidic rocks in the NW Scottish Highlands and also occurs at scattered localities elsewhere in the Highlands. See  Friday & Coppins (2012) The Lichenologist 44(6): 723–737 and Fungi of Great Britain and Ireland.