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A seemingly undescribed Peltigera and several noteworthy collections were made during a gradient study examining highway effects on forest lichen communities in western Wake County, North Carolina, USA. Rebentischia massalongii is here newly reported from North Carolina. Acrocordia megalospora, Gyalolechia flavorubescens, and Porina scabrida are new records for the Piedmont ecoregion in the state. Lobaria quercizans is noteworthy as belonging to a group of pollution-sensitive cyanolichens that until recently have not been recorded from the Triangle area of central North Carolina. Historical occurrences of Triangle Lobariaceae are also presented.

Pseudocyphellaria holarctica McCune, Lucking & Moncada was recently described as having a North American and Russian Far East distribution, based on specimens collected from eastern Asia, Alaska and Oregon. However, the single sequence representing a collection from Oregon in this study actually was from a specimen collected in Alaska. To clarify the range of this species we obtained ITS sequences for all specimens identified as P. holarctica from Oregon examined in the original study, as well as 23 putative P. hawaiiensis collections from Oregon. Analysis of ITS regions of these specimens indicated that all were assignable to P. hawaiiensis rather than to P. holarctica. No specimens of P. holarctica are known from Oregon, California or Washington.

As part of a larger systematic and taxonomic revision of the genus Sticta in the northern Andes, several species were discovered forming green algal and cyanobacterial photosymbiodemes, seven of which are new to science and are described here—S. lobarioides Moncada & Coca, S. macrothallina Moncada & Coca, S. neopulmonarioides Moncada & Coca, S. phyllidiokunthii Moncada & Lucking, S. pseudolobaria Moncada & Coca, S. pulmonarioides Moncada & Coca, and S. tatamana Moncada & Coca. All species are discussed and illustrated, and a key to species with Lobaria pulmonaria gross morphology is given.