Oxalis pes-caprae L. (Oxalidaceae), nova vrsta u hrvatskoj flori

This paper reports the first findings of the species Oxalis pes-caprae L. in Croatia. The species was found in the town of Komiža (the island of Vis) in the spring of 2000 as well as on the island of Biševo in the spring of 2001. In both cases plants were found within ruderal vegetation. The species is extensively naturalized in the Mediterranean region and western Europe, but in Croatian flora it comes as an adventitious species.U radu se iznose podaci o prvim nalazima vrste Oxalis pes-caprae L. u Hrvatskoj. Vrsta je nađena u gradu Komiži na otoku Visu u proljeće 2000. godine, te na otoku Biševu u proljeće 2001. godine. Na oba nalazišta biljke su zabilježene unutar ruderalne vegetacije. U Mediteranu i zapadnoj Europi vrsta je uvelike naturalizirana, dok u flori Hrvatske dolazi kao adventivna vrsta

Oxalis pes-caprae L. (Oxalidaceae), nova vrsta u hrvatskoj flori

This paper reports the first findings of the species Oxalis pes-caprae L. in Croatia. The species was found in the town of Komiža (the island of Vis) in the spring of 2000 as well as on the island of Biševo in the spring of 2001. In both cases plants were found within ruderal vegetation. The species is extensively naturalized in the Mediterranean region and western Europe, but in Croatian flora it comes as an adventitious species.U radu se iznose podaci o prvim nalazima vrste Oxalis pes-caprae L. u Hrvatskoj. Vrsta je nađena u gradu Komiži na otoku Visu u proljeće 2000. godine, te na otoku Biševu u proljeće 2001. godine. Na oba nalazišta biljke su zabilježene unutar ruderalne vegetacije. U Mediteranu i zapadnoj Europi vrsta je uvelike naturalizirana, dok u flori Hrvatske dolazi kao adventivna vrsta

Sporobolus pungens (Schreber) Kunth (Poaceae), rijetka i ugrožena psamofitska biljna vrsta u Hrvatskoj

Sporobolus pungens (Schreber) Kunth is rare and endangered psammophytic plant species, with four localities in Croatia known to date, all on the central and south Dalmatian islands. In October 2001 a new locality was found on the island of Mljet, in Blaca Bay seashore sands, as a part of the psammo-halophytic community Echinophoro-Elymetum farcti (Ammophilion).Sporobolus pungens (Schreber) Kunth, rijetka i ugrožena psamofitska biljna vrsta, dosad je bila poznata s četiri nalazišta u Hrvatskoj na srednjodalmatinskim i južnodalmatinskim otocima. U mjesecu listopadu 2001. nađeno je novo nalazište na otoku Mljetu, u uvali Blaca, na obalnim pijescima u sastavu psamohalofitske asocijacije Echinophoro-Elymetum farcti (Ammophilion)

Phylogeny of the Centaurea group (Centaurea, Compositae) - Geography is a better predictor than morphology

The Centaurea group is part of the Circum-Mediterranean Clade (CMC) of genus Centaurea subgenus Centaurea, a mainly Mediterranean plant group with more than 200 described species. The group is traditionally split on morphological basis into three sections: Centaurea, Phalolepis and Willkommia. This division, however, is doubtful, especially in light of molecular approaches. In this study we try to resolve this phylogenetic problem and to consolidate the circumscription and delimitation of the entire group against other closely related groups. We analyzed nuclear (internal transcribed spacer of the ribosomal genes) and chloroplast (rpl32-trnL intergenic spacer) DNA regions for most of the described species of the Centaurea group using phylogenetic and network approaches, and we checked the data for recombination. Phylogeny was used to reconstruct the evolution of the lacerate-membranaceous bract appendages using parsimony. The magnitude of incomplete lineage sorting was tested estimating the effective population sizes. Molecular dating was performed using a Bayesian approach, and the ancestral area reconstruction was conducted using the Dispersal-Extinction-Cladogenesis method. Monophyly of the Centaurea group is confirmed if a few species are removed. Our results do not support the traditional sectional division. There is a high incongruence between the two markers and between genetic data and morphology. However, there is a clear relation between geography and the structure of the molecular data. Diversification in the Centaurea group mainly took place during the Pliocene and Pleistocene. The ancestral area infered for the Circum-Mediterranean Clade of Centaurea is the Eastern Mediterranean, whereas for the Centaurea group it is most likely NW-Africa. The large incongruencies, which hamper phylogenetic reconstruction, are probably the result of introgression, even though the presence of incomplete lineage sorting as an additional factor cannot be ruled out. Convergent evolution of morphological traits may have led to incongruence between morphology-based, traditional systematics and molecular results. Our results also cast major doubts about current species delimitation. © 2014 Elsevier Inc