Published online by Cambridge University Press: 19 July 2007
The first sorediate species in the genus Llimonaea, L. sorediata is described from coastal areas of western Europe. This new species is easily mistaken for Dirina massiliensis f. sorediata with which it often co-occurs. It grows on vertical or overhanging acidic cliffs. Fertile specimens were recently collected in Portugal. A description of the species together with notes on distribution, ecology and chemistry are provided and a key to the species of Llimonaea is also provided.