391 research outputs found
Garrigue plant communities of ultramafic outcrops of Tuscany (central Italy)
No full textGarrigue plant communities of the ultramafic outcrops in Tuscany are here analyzed from a phytosociological point of view on the basis of original and published data. All the investigated vegetation types belong to the association Armerio-Alyssetum bertolonii, already described from Monte Ferrato. Two subassociations, typicum and Euphorbietosum spinosae subass. nova, are recognized, their distribution evidenced and their structural and chorological differences pointed out. The syntaxonomical problems of the Tuscan ultramafic communities are discussed. -Author
Festuca silana (Poaceae), a new species from the Sila plateau in Italy
No full textA new hexaploid species of fine-leaved fescue from Festuca sect. Festuca (Festuca silana Ardenghi, Pallanza & Foggi, sp. nov.) endemic to the Sila plateau is described. The new taxon shows morphological affinities with species of the F. marginata group from which it can be distinguished by higher ploidy, ecology, and leaf cross section anatomy. ddRADseq data suggests F. silana could be a local hexaploid descendant/derivate of the widespread diploid F. marginata. Its distribution is restricted to several localities in the Sila highlands of the Southern Apennines, Italy
The coast and island habitats of Tuscany: Present situation, vulnerability and perspectives [Gli habitat costieri ed insulari della Toscana: Conoscenze attuali, prospettive e vulnerabilità]
No full textA synthetic data set drawn from a Tuscan regional project (Repertorio Naturalistico Toscano) intended to individuate sites with habitats of European and regional importance in its territory, focused on coast and island habitat of conservation interest is reported and discussed. A synthetic method to assess habitat evaluation in terms of quality and vulnerability is illustrated. Finally, some scientific-vegetation investigations and management actions of active conservation resulted from basic knowledge studies are briefly presented. © Società italiana di Scienza della Vegetazione
Notulae alla checklist della Flora vascolare italiana 8: 1593. Festuca stricta Host subsp. trachyphylla (Hack.) Patzke ex Pils (Poaceae).
No full textLectotypification and combination of Festuca apennina (Poaceae)
No full textThe name Festuca apennina is discussed and lectotypified using a specimen held at FI. A new combination, Lolium apenninum, is proposed
Le collezioni lichenologiche dell'Herbarium Universitatis Florentinae (FI) e dell' Erbario Tropicale di Firenze (FT). Not. Soc. Lich. Ital
No full textThe acidophytic shrublands in the north-west of the Italian peninsula: ecology, chorology and syntaxonomy
No full textThe shrublands growing on siliceous and/or calcium-poor substrata of the hilly and mountainous areas of north-western and
central Italy were studied. This secondary vegetation is dominated by several acidophilous shrubs like Ulex europaeus, Cytisus
scoparius, Erica arborea, E. scoparia and Calluna vulgaris. The synecology, synchorology and syntaxonomy of this vegetation
was studied using multivariate methods, and discussed in comparison with similar types described in other zones of the
Italian peninsula. Two new subassociations are proposed here: Erico arboreae-Arbutetum unedonis genistetosum germanicae and
Calluno-Sarothamnetum ericetosum scopariae. Calluno-Sarothamnetum is typified; the Sarothamnion alliance is discussed and
referred to Cytisetea scopario-striati. The presence of Calluno-Ulicetea and Cytisetea scopario-striati classes is discussed, and a
syntaxonomical scheme is proposed
The <i>Festuca violacea</i> aggregate (Poaceae) in the Alps and Apennines (central southern Europe)
No full text The Festuca violacea aggregate in the Alps and Apennines was the subject of full morphological, biosystematic, chorological, and ecological investigations carried out on herbarium specimens, living plants under cultivation, and wild populations. In the two mountain ranges, seven taxa were found to occur in the summit area: Festuca violacea Gaudin ssp. violacea, Festuca violacea ssp. puccinellii (Parl.) Foggi, Graz. Rossi et Signorini, Festuca violacea ssp. italica Foggi, Graz. Rossi et Signorini, Festuca melanopsis Foggi, Graz. Rossi et Signorini, Festuca norica (Hack.) K. Richt., Festuca picturata Pils, and Festuca nitida Schultes ssp. nitida. Synonyms, descriptions, original iconography, karyological data (new data for F. violacea ssp. puccinellii), distribution, and ecology were gathered for each taxon, together with original identification keys. The possible origin and diffusion of the different entities are discussed. Special attention was given to F. melanopsis and to the three subspecies of F. violacea, for which morphometric multivariate analyses (cluster analysis and discriminant analysis) were performed. A new taxonomic treatment of the aggregate is proposed.Key words: Festuca, Poaceae, Europe, morphometric analyses, systematics. </jats:p
Analysis of genetic structure of Ranunculus baudotii in a Mediterranean wetland. Implications for selection of seeds and seedlings for conservation
No full textSeed collection and storage of wild species in ex-situ seed banks should be continued as an integrated tool for the conservation of plants in their habitats. Although seed-bank facilities are widely used today, their seed samples often suffer low genetic diversity. Consequently, reintroduced seeds and plant material may not have the resilience to cope with future environmental stress so leading to complete wastage of seeds. Molecular techniques allow the benefit of quantification of the genetic diversity of a seed collection in comparison with that of the natural population. In this study we focus on ex-situ seed bank samples and living collections of Ranunculus peltatus subsp. baudotii. We compare their genetic diversity and structure with that of the natural population before and after undertaking a restoration project on a natural pond in the Tuscan Archipelago National Park. ISSR analyses, carried out on a total of five sampling groups, shows a relatively high level of genetic diversity for the ex-situ cultivated groups. The analysis of molecular variance, in agreement with clustering obtained in the neighbour-joining dendrogram and with the pattern from cluster analysis, suggests dividing the samples analysed into two groups: one formed by individuals sampled before the pond restoration and the other formed by the subsequent pond population. The results highlight the importance of planning mixed propagation lines which can be obtained through the use of a range of germination conditions to exploit a novel source of genetic variability which may otherwise remain hidden within the seed collection
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