Where does Sedum cepaea L. (Crassulaceae) - one of the rarest species of Croatian flora - really grow?
The distribution of Sedum cepaea in Croatia is limited to sciophilous or slightly heliophilous forest habitats in the zone dominated by Quercus petraea, developed on acidic types of soil above siliceous bedrock. We confirm a finding spot on Moslavačka gora and describe new localities on Zrinska gora (central Croatia). Two S. cepaea populations on Nikolino brdo [hill] in Topusko disappeared a century ago.
Nina Vuković, Vedran Šegota, Antun Alegro and Zorana Sedlar
Corrigiola litoralis is the only member of the genus in the Croatian flora. Most available data are more than 50 years old, and include only four localities in Croatia, exclusively in the islands of the Mediterranean region. During a floristic survey of the island of Molat (Northern Dalmatia) we recorded a small population in Zapuntelsko polje, in a damp, shallow depression, seasonally occurring as a temporary pond. Comparison with the existing literature shows that C. litoralis often occurs in Mediterranean temporary ponds and similar globally important and threatened habitats. We strongly believe that careful studies of populations of C. litoralis and other species with similar ecologies are necessary in order to preserve these habitats and therefore propose actions to achieve this goal.
Anogramma leptophylla is one of the rarest fern species in Balkan Peninsula. In Croatia, several localities were noted prior to this study, when its presence was confirmed with a discovery of a small population on the island of Mljet (Southern Adriatic). This was, after almost 80 years, the first reliable finding of this species along Eastern Adriatic. The establishment of A. leptophylla on the western part of the island of Mljet may be attributable to certain favourable environmental conditions, but essentially to higher air and soil humidity. Its unusual bryophyte-like life strategy, with short-living annual sporophytes, facilitates its survival under Mediterranean climate, generally unfavourable for pteridophytes.
A regionally extinct taxon, Ammophila arenaria (L.) Link subsp. arundinacea H. Lindb., has been rediscovered in the Croatian flora after 78 years. Previously it was known only from two coastal sand dune sites in Northern Dalmatia. The habitat at the locality of Crnika near Lopar on the northern Adriatic island of Rab is destroyed and A. arenaria subsp. arundinacea does not grow there anymore. At the second locality, on the sand dunes of Kraljičina plaža in the vicinity of the town of Nin, A. arenaria subsp. arundinacea was rediscovered and confirmed after 174 years. This is the only population of this taxon in Croatia, counting 48 mature individuals where the psammophylous habitat of Kraljičina plaža is under strong anthropogenic influence. This taxon is now classified as critically endangered (CR) and merits adequate active protection and conservation of its psammophylous habitat.
Antun Alegro, Vedran Šegota, Nikola Koletić, Nina Vuković, Tihana Vilović and Anja Rimac
A small population of the circumholoarctic species Glaux maritima L. (Primulaceae) was discovered in the Mediterranean part of Croatia, on the bank of the River Zrmanja. This is the first record of G. maritima in SE Europe, and the third record in the Mediterranean, apart from in Spain and the Asian part of Turkey. It was found on the open riverbank within sub-halophytic vegetation, forming a small population of several dozen erect stems, most probably clonally propagated. The site is characterized by a periodic intrusion of seawater. We propose to classify this species as critically endangered (CR) on a national level due to the small population size and the fragile habitat, which requires active protection and conservation.
Eva Kabaš, Snežana Vukojičić, Antun Alegro, Boštjan Surina, Nevena Kuzmanović, Vedran Šegota and Dmitar Lakušić
Phytosociological and numerical analyses of grasslands dominated by Sesleria juncifolia s.l. in Serbia were performed in order to resolve their syntaxonomy and nomenclature. Twelve releves were sampled on Mt. Mučanj (western Serbia), which were then compared with similar releves from other parts of the Balkan Peninsula by means of numerical analyses. The releves were classified using cluster analysis, while the ordination was conducted using Detrended Correspondence Analysis (DCA). The results suggest the occurrence of two floristically well defined Dinaric associations in Serbia: Seslerio juncifoliae-Edraianthetum graminifolii ass. nova from Mt. Mokra Gora (Oxytropidion urumovii, Elyno-Seslerietea) and Diantho petraeae-Seslerietum juncifoliae ass. nova (Chrysopogono-Saturejion, Festuco-Brometea) from Mt. Mučanj.