The spring field meeting 1987 went to the best part of the Netherlands for saxicolous lichens in a natural habitat, Zuid-Limburg and to adjacent Belgium. Opegrapha mougeotii and Thelidium dionantense were found for the first time in the Netherlands, and Protoblastenia cyclospora in Belgium. The lichen flora of the calcareous rock outcrops has been decreasing since 1982. In total 189 species were found.