Lichens of Arctic America. II. Additions to Records of Lichen Distribution in the Canadian Eastern Arctic

DISTRIBUTION. X. parietina, a very common lichen in Europe, has a unique pattern of distribution along both coasts of North America and the lower Gulf of Mexico (fig. 5). It is strictly oceanic and does not extend inland more than a few miles (excepting one locality on the Connecticut River in Vermont). The species name parietina in North America has unfortunately been assigned in the literature to other species of Xanthoria, including X. candelaria, X. fallax and X. polycarpa.