Three name changes are proposed for the lichen checklist. Caloplaca heppiana should be called C. flavescens (Huds.)Laundon comb. nov. It is suggested that Coelocaulon muricatum (Ach.)Laundon comb. nov. is a more appropriate name for C. aculeatum subsp. hispidum. The name Schismatomma virgineum should be replaced with S. cretaceum (Hue)Laundon comb. nov.

Samples of Cladonia mitis were collected from three microhabitats within an open field in eastern Hokkaido, Japan. Two sets of sample thalli were taken in close proximity to geothermal vents and a third from a neighbouring area not directly affected by outgassings. Enzymes were extracted and separated by isoelectric focusing, and multiple enzyme forms of three oxidoreductases, glucose-6-phosphate dehydrogenase, glutamate dehydrogenase and superoxide dismutase, and two hydrolases, esterase and alkaline phosphatase, were examined. Similarities between microhabitats based on electrophoretic results were calculated using Jaccard's similarity coefficient and expressed graphically through the complementary techniques of clustering and ordination. All of the major differences in isozyme patterns between remote samples and those near fumaroles were in the two highly polymorphic enzymes, esterase and alkaline phosphatase. Differences were as great or greater than those between geographically separated conspecific populations of lichens examined previously. In the more sulphurous microhabitats, nine bands were much more frequent and eight much less so than in locations further from the source of gases.

Descriptions are given of two little-known species of Brigantiaea (Lecanorales, Brigantiaeaceae) which are widely distributed in New Zealand. Brigantiaea lobulata F. J. Walker & Hafellner sp. nov. is described and the following new combinations are proposed: B. tabacodes (Zahlbr.), B. nipponica (Sato) and B. austroamericana (Räsänen), combs. nov.

Morphogenesis of podetia in Cladonia subcervicornis is a non-linear, repeating process based upon a pattern of meristem enlargement and division. Variability in mature podetia of C. subcervicornis, which may appear branched or scyphoid, is the result of variation early in ontogeny. The growth pattern of C. subcervicornis represents a continuum of developmental stages. It is impossible to predict the form of the mature thallus of C. subcervicornis because growth in this species is fluid. The morphology of the mature thallus of C. subcervicornis is difficult to circumscribe using conventional Cladonia terminology, because the processes that form the thallus are dynamic and heterogeneous. The meristem shapes that are produced during early ontogeny in C. subcervicornis are relatively simple, and the processes by which they are formed are uncomplicated. Yet podetial form in C.subcercicornis is difficult to interpret.

Macentina aurantiaca sp. nov. (Verrucariaceae) is described from the Burren, western Ireland. A sciophilous lichen, it is characterized by its comparatively large, orange ascomata and by its mostly 7-septate, elongate-ellipsoid ascospores.

Amandinea myrticola is described as new from Portugal. This corticolous species is characterized by the thin, smooth to minutely rugose and greyish thallus lacking secondary metabolites, the small lecideine apothecia which exhibit a pseudothalline margin when young and the small, smooth, Physconia-type ascospores with strongly pronounced and persistent median wall thickenings. It occurs on smooth bark in two localities characterized by a Mediterranean climate with an Atlantic influence.

Hypogymnia papilliformis McCune, Tchabanenko & X. L.Wei is described as a new species of lichenized fungus from the Primorsky region of Russia and Shaanxi Province in China. It is a relatively rare species from mixed conifer-broadleaved forests in suboceanic climates, in mountainous areas at elevations of 600–1500 m. Most similar to H. delavayi, the species are distinguished by branching pattern and chemistry. Hypogymnia papilliformis is predominantly isotomically branched while H. delavayi usually develops subpinnate branching. The ceiling of the lobe cavity is mid brown to dark brown in H. papilliformis, while the ceiling is often pale brownish or white in H. delavayi. Also, H. papilliformis lacks 3-hydroxyphysodic acid, and thus has a K– medulla, while H. delavayi always contains 3-hydroxyphysodic acid as a major substance and is thus K+ slowly reddish brown. We provide a key to the six esorediate Hypogymnia species known from the Russian Far East.

The new species Ochrolechia splendens Lumbsch and Messuti, is described from Mexico, south-western North America, where it occurs on exposed siliceous rocks. It is characterized by relatively large apothecia with entire margins, the presence of the gyrophoric acid chemosyndrome in the thallus and apothecial disc and the presence of lichexanthone as major components.

Chaenotheca degelii sp. nov. is described from New Zealand. The position of the species in the genus and the chemistry are discussed briefly. Chaenotheca degelii is a lignicolous species mainly occurring in the Central Plateau of North Island, but one isolated occurrence in the South Island is also known.