This volume marks the end of a long-lasting project. It presents distribution maps and explanatory texts for over 200 taxa of vascular plants with an eastern or north-eastern distribution pattern in Norway. All basic information (including herbarium specimens, literature, lists) has been critically evaluated. For each taxon, the earliest records, habitat (ecology), and distribution within Norway are commented upon, and the relationship to distribution patterns in neighbouring countries is discussed. Although much basic documentation is due to pioneers in the late 18th century and 19th century, substantial new information has been provided during the production of this volume, which also has many comments on solved and unsolved taxonomical problems and problems related to the immigration (or possibly survival) history connected to the taxa. The target audience is botanists dealing with plant taxonomy and phytogeography in boreal and sub-arctic environments. Hopefully, the texts and illustrations will entice a larger audience to engage in further study of Norwegian vascular Flora.