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The exsiccata 'Dupla Graecensia Lichenum (numbers 1291– 1330)' comprises 40 collections (271 specimens) of lichen duplicates (including the two non-lichenised fungi Mycocalicium subtile and Zythia resinae) from the following 10 countries: Artsakh (= Nagorno-Karabakh Republic, Province Martakert), Australia (state of New South Wales), Austria (states of Carinthia, Salzburg, Styria, and Upper Austria), Czech Republic (Jihočeský kraj [=Southern Bohemia]), Greece (Karpathos Island), Italy (region of Friuli-Venezia Giulia), Portugal (Madeira Island), Slovenia (Primorska), Spain (Canary Islands), Switzerland (canton of Bern). TLC- investigations were carried out for 15 species. Apothecia of Letharia vulpina have been shown to contain relatively high amounts of norstictic acid. Apothecia of Zythia resinae contain - beside a reddish-orange pigment - several depside/depsidone like compounds in high concentration.

Anhand von Fotos wird das Phänomen der Kragen-kiefer (Schindelkiefer, Schuppenschürzenkiefer) von Pinus sylvestris, das in einem Waldgebiet am Stadtrand von Graz zu bestaunen ist, dokumentiert und mögliche Ursachen der aberranten Borkenbildung diskutiert. Wir ma-chen den Vorschlag, ein Baumexemplar als Naturdenkmal auszuweisen und damit unter Schutz zu stellen. Based on photos taken in a forest in the suburban area of Graz, the phenomenon of so called 'collar pines' (Kragenkiefern, Schindelkiefern[shingle pines], Schuppenschürzenkiefern) of Pinus sylvestris(Scots pine)is documented and possible causes of the aberrant bark formation are discussed. We propose one selected tree to be designated as a protected 'natural monument'. Version of record

This presentation aims to describe and compare moss diversity and vegetation of two large areas with tufa forming vegetation dominated by bryophytes – the Plitvice Lakes (Alpine Biogeographical Region) and the Krka River (Mediterranean Biogeographical Region). The Plitvice lakes are a system of 16 larger and several smaller lakes, separated by tufa barriers, which stretches along 8 km, representing the largest habitat of the tufa forming moss communities (Cratoneurion commutati) in Croatia and the whole of Europe. The Krka River is a large karstic river with tufa barrages forming a complex system of interchanging fast and slow water flow, waterfalls and barrage lakes. Seven waterfall systems harbouring tufa forming bryophyte communities are situated along the 73 km of the river course before the mouth into the Adriatic Sea. Ninety phytosociological relevés were made on the Plitvice Lakes and 52 on the Krka River. They were analyzed using various multivariate techniques (TWINSPAN, DCA), Ellenberg’s ecological indicator values and fidelity indices. Phytosociological affiliation of species and biogeographic elements were also analysed. Moss communities could be assigned partially to the Cratoneurion commutati and partially to the alliance Adiantion Br.Bl. ex Horvatić 1934, but sharing a large proportion of species. Comparison of floristic composition of communities from two the biogeographic regions reveals high resemblance in main species as well as the low proportion of species assigned as characteristic for the class Montio-Cardaminetea Br.-Bl. et Tx. ex Klika et Hadač 1944, where Cratoneurion commutati is placed. Light, moisture (including water velocity) and temperature are the most important environmental factors influencing vegetation difference among these areas. In both areas, considering the eastern limit category, dominant circumpolar species are followed by European ones. Considering major biomes in both areas boreo- temperate and southern-temperate elements are the most prominent. Boreotemperate element has the highest proportion of species followed by southern-temperate element on the Plitvice Lakes, while these proportions are reversed on the Krka River. We can conclude (1) that differences between communities of the two areas are based rather on the quantitative proportion of species than on qualitative differences in species composition, (2) that differences inside communities of a certain area are higher than between areas and (3) that ecological gradients reflected in species composition are similar in both areas.

Patterns of plant species richness have always been a topic of interest in biogeography and ecology. Mountain ecosystems are spots of plant diversity in which species composition and traits depict a long evolutionary history of species adaptation to steep environmental gradients. The variation of species richness along elevational gradients has been documented for a variety of taxa and geographical areas, with two most frequent patterns – a monotonic decrease in species richness as a function of elevation or a humpshaped relationship, with a peak in species richness at intermediate elevations. Despite the common belief that altitudinal patterns of bryophyte diversity are poorly studied and understood, a detailed literature overview reveals that, in the last hundred years, as many as fifty scientific papers on this subject have been published globally, with only few regarding European mountains. A comprehensive study of the altitudinal distribution of bryophytes in the Dinaric Alps was conducted along two complete transects with elevational range about 1500 m, in Gorski Kotar Massif and Mt Sjeverni Velebit (Croatia, Western Balkan). The gamma diversity was described by a total of 185 bryophyte species, which makes one-fourth of known bryophyte diversity in Croatia. Patterns of alpha diversity were best described by the cubic regression function with diversity maxima approximately between 1100 and 1200 m a.s.l. The total number of taxa was the lowest in the lowest belt of holm oak and the highest in the complex of spruce communities. The highest species turnover (beta diversity) appears with evergreen boreal (Picea abies) and subalpine (Pinus mugo) krummholz vegetation types. Bryophytes exhibit wider altitudinal ranges and a greater tendency toward exclusively higher elevations compared to vascular plants. Bryophytes do not follow Rapoport’s rule of increment of the average altitudinal range of species with increasing elevation. Bryophyte assemblages along the altitudinal gradients are ecologically primarily defined by gradients of climatic indicator values and gradients of substrate characteristics (nitrogen amount and pH reaction). The indicator values for bryophytes exhibit weaker indicator potential in explaining floristic composition compared to indicator values for vascular plants, which proves that these two groups only partially describe the same ecological gradients.