The disjunct distributions of seven vegetatively reproducing Rinodina species are discussed. They occur in at least two of three oceanic regions, comprising the Pacific Northwest and Great Lakes-St. Lawrence regions in North America, and the western parts of Europe. No sexually reproducing species with similar disjunct distributions are known in the genus. Two other vegetatively reproducing species occur in single but different North American regions. The three regions are considered to be refugia for a lichen flora that occurred in broad-leaved deciduous (Arcto-Tertiary) forest occupying a temperate oceanic zone surrounding the Arctic Ocean in Late Paleocene~Early Eocene times. It is suggested that these species moved southwards along three or four narrow land corridors to occupy their current distributions as the Arctic cooled in the Eocene and Oligocene. These corridors were the Pacific seaboard, the coast of the ancient seaway between North America and Greenland, and down the Atlantic coast of Scandinavia. A fourth corridor may have been the coastline of the ancient Turgai Sea. The rapidity of climate change and reproducing species than to the sexually reproducing species ofthe genus, resulting in their different distribution patterns today. Rinodina thomsonii and R. willeyii are new to science and R. thujae, hitherto considered a North American endemic, is synonomous with R. excrescens. Key words: Lichens, Physciaceae, Rinodina, disjunct distributions, paleogeography.