The lichenological excursion to parts of Zeeland confirmed that the lichen flora is still rather rich, but declining. Several species, notably Bryoria capillaris and Ramalina baltica, which were restricted to the area, were not found and should be regarded as extinct in the Netherlands. Maritime species like Caloplaca marina, C. salina and Lecanora helicopis occurred on wood and both siliceous and calcareous rock on dykes.