Tønsberg T.
(1992):
The sorediate and isidiate, corticolous, crustose lichens in Norway,
Sommerfeltia,
14: 1-331
128 species in 45 genera of sorediate and isidiate, crustose, corticolous lichens are recorded from Norway. Accounts of their morphology, chemistry, and substratum preferences are presented, and a discussion of their distribution in Norway is supported by maps for a number of taxa. With few exceptions, the taxa can be distinguished on thallus characters alone. Several taxa, especially those with brown or blue-pigmented soralia, have soredia with a distinct cortex. New species are: Buellia arborea …
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