[in Norwegian with English abstract: ] This article describes 12 species of rare and redlisted crustose lichens which are more or less common in the coastal pine forests in the south-western part of Norway, normally referred to as boreonemoral rainforests due to their occurrence in the boreonemoral climatic zone. Many locations are relatively rich in deciduous trees where these specified lichens are growing on branches and stems of these. The lichens in question are referred to as diagnostic species and are used to identify habitats of temperate rainforest. Temperate rainforest is recognized as one of the most important habitats in in the context of conservation of European beiotopes, and the western coast of Norway together with the western coast of Scotland and Ireland are the most important areas for these lichens in Europe. Many of the locations where they are growing, are situated near to already existing infrastructure, which very easily can be expanded. The most common lichens described here are Pyrenula occidentalis, Arhonia ilicina and Graphis elegans, and the most infrequent ones are Thelothrema macrosporum and Bactrospora homalotropa. The preferences for trees as a substrate for the different lichen species are shown based on around 1250 observations, and some species of lichens seem to be more discriminating to substrate than others.