Contribution to the flora of Portugal, lichens and lichenicolous fungi IV

Twenty four lichens and lichenicolous fungi are reported as new to Portugal, including seven records new to Iberian Peninsula. These reports are from a wide range of localities throughout the country. Epiphytic, terricolous as well as saxicolous species are recorded. Some very rare species are also treated. An annotated list with notes on morphology, chemistry and ecology is given.