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We report 100 lichen and allied fungi species for the first time from Quebec, Canada. Six of these species are new to North America: Arthonia subastroidea, Biatora mendax, Cornutispora pyramidalis, Gyalecta hypoleuca, Taeniolella pertusariicola, and Varicellaria lactea. Six additional species are new to Canada: Cecidonia xenophana, Lecidea commaculans, L. herteliana, Polycoccum sporastatiae, Scoliciosporum intrusum, and Stereocaulon leucophaeopsis. All collections are from parc national de la Gaspesie on the Gaspe Peninsula in eastern Quebec. Our collections were made between 2012 and 2017, primarily during Crum and Tuckerman Workshops. We provide diagnostic descriptions of all species that are new continental or national records. Our results demonstrate the park's rich and unexplored biodiversity and conservation importance, and contribute to a better understanding of the lichen and allied fungus biota of Canada and North America.

The new taxa Cliostomum subtenerum, Dactylospora suburceolata, Fuscidea oceanica, Lecania granulata, Lecidea herteliana, and Ropalospora lugubris f. sorediata are described from collections made from Scotland and Wales. Outside the British Isles, D. suburceolata is also known from Switzerland, L. herteliana from NE North America and R. lugubris f. sorediata from Sweden and NE North America. In addition, Lecidea luteoatra Nyl. belongs to the Lecanora marginata group and the name Lecanora viridiatra (Stenh.) Nyl. is taken up for this species, Peterjamesia sorediata is transferred to Roccellographa, and Ropalospora atroumbrina is included in the synonymy of R. lugubris f. sorediata.

A total of 391 lichens were written up in Smith's English Botany, of which 57 were new. All were illustrated by James Sowerby. The copyright dates are given, which should be accepted as those of publication. They range from 1793 until 1814, and paper watermarks show that reprintings occurred until c. 1818. The locations of the type specimens are given, many of which are part of the BM Botany Library, mounted together with Sowerby's original English Botany drawings, and therefore often overlooked. Their current taxonomic position is evaluated. Only 11 of the 57 new lichens have been placed in synonymy, which indicates that Smith was an excellent lichen taxonomist. Caloplaca borreri J.R.Laundon is a new name for Lepraria ochracea Turner & Borrer ex Sm., whilst Herteliana gagei (Sm.) J.R.Laundon is a new combination with priority over H. taylorii P.James, and Trapelia glebulosa (Sm.) J.R.Laundon replaces T. involuta (Taylor) Hertel. Species requiring author corrections are Caloplaca cerina (Hedw.) Th.Fr., Enterographa elaborata (Leight.) Coppins & P.James, Lecidella pulveracea (Florke ex Th.Fr.) P.Syd., and Parmelia borreri Turner. Lichen daedaleus Sm. pre-dates Lecidea sorediata Ach. by 4 years, but has been proposed for rejection in order to retain the established name Pyxine sorediata (Ach.) Mont. Eight names remain undetermined, chiefly fungi in Spiloma. © 2005 The Linnean Society of London, Botanical Journal of the Linnean Society, 147, 483–499.

Lecanora herteliana is described from several collections from hard siliceous sandstone, in typically Mediterranean habitats in eastern Spain. The new species has a whitish thallus containing atranorin and norstictic acid. Its apothecia are mostly black, with a thalline exciple, which is finally excluded, and with a well developed true exciple.Lecanora herteliana is most closely related to L. subcoarctata, and it is discussed in relation to this species and other members of the L. marginata group.

A new checklist of the lichen-forming, lichenicolous and allied fungi occuring in the British Isles (including Ireland) is presented. The total number of species accepted is 1701, distributed through 294 genera. Of these species 1471 are lichen-forming, 183 lichenicolous, and 47 allied fungi. In addition to incorporating the results of investigations published since the last checklishts, the list embodies a great deal of original work by the authors and their collaborators; as a result a considerable number of changes in nomenclature are made here for the first time, including one new genus (Herteliana) and 56 new combinations. Names utilized in previous checklists are cross-referenced and relevant papers cited under generic heads.