Notes on some corticolous and lignicolous Buellia species from the IberianPeninsula

The morphology, anatomy, chemistry and ecology of some corticolous and lign icolous species of Buellia from the Iberian Peninsula that contain secondar y lichen compounds are discussed, including B. chloroleuca B. disciformis, B. erubescens, B. hyperbolica and B. leptoclinoides. These species are comp ared with other corticolous Buellia species that occur outside the study ar ea, including B. arnoldii; B. insignis, B. regularis and B. sanguinolenta. The misunderstood B. zahlbruckneri J. Steiner and B. jorgei, are synonyms o f B. erubescens, and the invalid taxon B. zahlbrcukneri sensu Schauer non S teiner and B, poeltii, are synonyms of B. chloroleuca. New chemical data on several taxa are reported. A key to the species and illustrations of their ascospores are provided. (C) 2000 The British Lichen society.