The taxonomy of A. fuscescens H. Magn. is clarified and its occurrence is verified from Colorado, Idaho, and Utah.

Lichen floras at two sites on the Aquarius Plateau were compared; including a high elevation site located at the crest of the Boulder Mountain plateau (3353 m) and a mid-elevation site along the base of the same mountain (2347 m). Lichens were collected from all available substrates at both sites. A total of 30 genera and 49 species are reported from the upper site with 21 genera and 35 species from the lower site. Fifteen genera and ten species were common to both sites. Overall, the two most common genera (Xanthoparmelia and Rhizoplaca) showed greater diversity and abundance at the mid-elevation site. Of the six Xanthoparmelia spp. identified during the course of this study, three were common to both sites; however, Xanthoparmelia plittii and Xanthoparmelia mexicana were restricted to the lower site while Xanthoparmelia wyomingica was found only at the upper site. Two Rhizoplaca spp. (R. chrysoleuca and R. melanophthalma) were abundant at both sites; however, Rhizoplaca peltata was rare to common at the lower site and rare at the upper site. These differences in species distributions and abundances emphasize the influence habitat has in determining the distribution of species across natural landscapes.

A remarkable new range extension of the subtropical Mexican species Brachymenium vinosulum is reported from Wyoming. The species was found on travertine terraces around the geothermal springs of Thermopolis' Hot Springs State Park in north central Wyoming. This finding represents the first state record and the northernmost occurrence of this subtropical species yet reported for North America and extends the known range northward by approximately 400 kilometers. B. vinosulum is recommended as a species of conservation concern in Wyoming.

Funaria convexa Spruce is reported new for the North American moss flora from the North Coast Ranges of Lake County, California. It is closely related to Funaria muhlenbergii Turn, and F. pulchella Philib., but differs in several gametophytic and sporophytic characters. A distribution map showing the Mediterranean climates disjunction is included.

The following species are newly reported for North Carolina: Chrysothrix onokoensis, Dirina massiliensis f. sorediata, Heterodermia casarettiana, Homostegia hertelii, Lichenoconium lecanorae, Mycoporum antecellans, Pyrenula cuyabensis, Santessoniella crossophylla, Trapelia coarctata, Trapeliopsis gelatinosa, Vouauxiomyces truncatus. The distribution of Dirina massiliensis f. sorediata in North American is mapped. The hosts and anamorph-telemorph relationship of Vouauxiomyces truncatus are discussed.

The following taxa are reported for the first time from Pennsylvania: Absconditella lignicola, Candelariella xanthostigma, Catillaria nigroclavata, Fuscidea arcuatula, Halecania pepegospora, Hypocenomyce friesii, Lichenoconium erodens, Microcalicium ahlneri, Myriospora heppii, Placynthium nigrum, Protoblastenia incrustans, Staurothele fissa, Strigula jamesii, Thelidium papulare, and Tremella candelariellae. The following taxa are reported for the first time from New Jersey: Arthonia epiphyscia, Fuscidea arcuatula, and Lecanora xylophila. The distribution of Botryolepraria lesdainii in eastern North America is discussed and mapped. The first modern collections of Buellia maculata, Dirinaria frostii, and Thelocarpon laureri from Pennsylvania are also reported. An additional population of the rare species Physcia pseudospeciosa is reported from Pennsylvania.