Acarospora smaragdula sensu stricto is discussed from North America. A new record for Oregon and the Pacific Northwest is reported. Acarospora subrufula is discussed and is recognized as not occurring in North America.

Notes on the occurrences of Arthothelium spectabile, Buellia maculata, Caloplaca flavorubescens, Cystocoleus ebeneus, Dictyocatenulata alba, Enterographa hutchinsiae, Graphis inversa, Megalaria beechingii, Myelochroa metarevoluta, Nectriopsis rubefaciens, and Thelotrema monospermum in North Carolina, USA are provided.

The status of Endocarpon pallidulum and E. petrolepideum in eastern North America is discussed, and the geographic distributions of the species are outlined. A discussion of the characters distinguishing the two species is also provided. The presence of Endocarpon pusillum in eastern North America is questioned as all material examined to date has been either E. pallidulum or E. petrolepideum.

Increased urbanization often leads to an altered and/or reduced lichen flora. Here we characterize the corticolous macrolichen flora of the Madison, Wisconsin area, and compare the present-day flora with historic collections made in the vicinity during the 1890's. The present-day flora consists mostly of small foliose taxa (16), which frequently occur in urban areas, a smaller number of medium-foliose taxa (13) and a very small number of fruticose taxa (3). Forty-four percent of the taxa collected in the 1890's are no longer found in the area, with the greatest amount of loss occurring in the medium-large foliose (62.5%) and fruticose (40%) guilds. Interestingly, three fruticose taxa, which were thought to have disappeared from the study area, were found in the modern survey.

The lichenicolous fungus Roselliniella microthelia (Wallr.) Nik. Hoffm. et Hafellner is reported for the first time from North America. The current world distribution of the species is reported. Range of hosts and type of infection is discussed and compared with other taxa. New, until now unpublished records of the species from the Czech Republic are used for comparison.

From 71 collections 48 species representing 29 genera of lichens were found during a one-day foray in the Hoffman Trail area of Theodore Roosevelt Natural Area, North Carolina in December 2006. All but one were found on bark, with nearly equal representation in the midbole and canopy layers of the forest; only one species was found growing on the forest floor. This checklist supplements that from a survey of the Natural Area conducted during the 12^th Tuckerman Workshop in 2003, which focused on the Theodore Roosevelt Nature Trail area. Twenty-seven taxa reported here were not encountered in the 2003 survey and thus represent new additions to the flora. Although not encountered during the survey, a population of the rare Teloschistes flavicans (lichenized Ascomycota: Teloschistiaceae) is reported from the Natural Area by park personnel.