Byssoloma maderense, recently described from Madeira, is shown to have a wide distributional range from a coastal portion of North America to the Black Sea region, actually being known from the southeastern United States (Delaware, Florida, Georgia, Louisiana, Maryland, North Carolina, South Carolina), the Atlantic Islands, Portugal, France, Georgia, and Russia.

A disjunct occurrence of Plagiochasma rupestre is reported for the first time from the Appalachian Mountains of Virginia. The occasion of its discovery is recounted, and the habitat is described. The occurrence is discussed in relation to other long-range disjunctions known from the Appalachians.

Lichen assemblages and their secondary metabolites may be influenced by the broader habitat. More specifically, the function of the thallus structure within a species may influence the production of some secondary metabolites. The objectives of this study were to examine thallus variation in secondary metabolites for one genus, Stereocaulon, and to compare the diversity of lichen assemblages and their secondary metabolite distributions in the boreal forest of northwestern Manitoba. Five sites in each of three study regions were selected (Sherridon, North Star, and Athapap), around the presence of a Stereocaulon thallus. All ground lichen species were collected from five quadrats within each site totaling 75 quadrats. Lichen species were identified and thin-layer chromatography was performed to identify secondary metabolites. A total of 59 ground lichen species and 20 secondary metabolites were identified. This study showed that norstictic acid and constictic acid were absent from the pseudopodetia but present in the apothecia and phyllocladia of Stereocaulon tomentosum only. It also showed that species richness was different between one region (Athapap) and the other two regions (North Star and Sherridon). North Star and Sherridon had the highest species richness and number of metabolites and Athapap had the lowest.

Preissia quadrata (Scop.) Nees (Marchantiopsida, Marchantiaceae) is a northern hemisphere species usually defined as having two geographically distinct subspecies: Preissia quadrata (Scop.) Nees ssp. quadrata and P. quadrata ssp. hyperborea R.M. Schust. The subspecies quadrata is considered to have a temperate-boreal distribution, whereas the subspecies hyperborea is probably restricted to Arctic / Sub-Arctic / alpine regions. Until recently, the subspecies hyperborea had been documented from only a few jurisdictions in North America. This article describes new records of the subspecies hyperborea in Canada, including the first reports for Alberta based on field collections, and for Labrador, Northwest Territories, and the Yukon based on annotations of herbarium collections of Preissia quadrata that belong to the subspecies hyperborea. An updated distribution map of the subspecies hyperborea in North America is provided. The subspecies hyperborea is shown to be more widely distributed in northern and montane regions of the continent than previously reported; however, some taxonomic impediments remain for the Preissia quadrata complex. An improved understanding of the phenology of the subspecies hyperborea across its range may facilitate its circumscription.

Brothera leana, Bryum ruderale, Bryum subapiculatum, Bryum violaceum, Clasmatodon parvulus, Cryphaea glomerata and Orthotrichum diaphanum are reported from New York State.

Frullania stylifera, previously known only from its southern Minnesota type locality, is newly documented from stations in Arkansas, Missouri, Oklahoma, and Tennessee. The species has often been confused with F. inflata and F. eboracensis, but differs from those species in having broadly reniformovate dorsal lobes; larger, lamelliform styli; more numerous oil bodies; larger underleaves with angulations on the margins; and half-immersed, more gradually rounded, weakly keeled perianths.