Search results for "FLORA"
showing 10 items of 989 documents
The recent spread of the invasive woody alien plant Melia azedarach L. (Meliaceae) in Sicily
2013
This paper aims at reporting the ongoing process of naturalization of Melia azedarach L. in Sicily. In fact, over half a century after the first detection of spontaneous self-sown seedlings, an abrupt increase of naturalization cases has been recorded by the authors during the last twenty years. More in detail, M. azedarach successfully colonized many suburban lowland areas along the coasts of the island which are characterised by thermo-Mediterranean bioclimate. According to both field and literature data, a gradual spread of M. azedarach in the island can be expected, although it is not possible to predict the speed with which this will occur. Historical information on its introduction at…
Wedelia glauca (Asteraceae) a new naturalized alien to Italy
2022
Wedelia glauca (Ortega) Blake (Asteraceae), perennial herb native to the tropical regions of South America, was found naturalized in the suburbs of Palermo (Sicily). This is the first report to Italy. In Europe this plant is known from Spain and Portugal.
NON-NATIVE FLORA OF ITALY: SPECIES DISTRIBUTION AND THREATS
2010
In this paper, we provide an overview of the distribution and invasive status of non-native species in the Italian flora across its administrative regions, biogeographic regions and main land use types, and a synthesis of current knowledge on the threats they pose within the country. The information on non-native plant species collected during the project oA survey of the non-native Italian florao was used to compile comprehensive regional and national databases. The number of non-native species within a given administrative region increases in proportion to its size, resident population density and latitude, reaching the highest values in the intensively cultivated, heavily industrialized …
New Aloes casual aliens in Sicily
2022
Aloë arborescens, A. brachystachys and A. maculata (Asphodelaceae) are reported for the first time as casual aliens in Sicily. A. brachystachys is new also for the alien flora of Italy.
Acacia cyclops A. Cunn. ex G. Don (Leguminosae) in Italy: first cases of naturalization
2012
The first two cases of naturalization of Acacia cyclops are reported for Italy. Young trees were observed growing in the wild some 15 years ago on Linosa (Pelagie Islands, Strait of Sicily). A decade later, this alien plant should no longer be considered as a casual, since a very intensive process of self-sown regeneration has been observed in some plantations on Lampedusa, the major island of the same Archipelago. The available literature suggests the need for careful monitoring of the ongoing invasion process, as A. cyclops has already shown a very invasive behaviour elsewhere within Mediterranean-type biomes due to its ability to withstand high environmental stresses. As migrating birds …
Allium makrianum (Alliaceae), a new autumnal species from Greece
2010
Allium makrianum is described as a new species growing on the limestone of the Chios, north-eastern Aegean island (Greece). It is a very rare autumnal geophyte, showing some relationship with A. archeotrichon from Rhodos. Its iconography, morphology, chromosome number (2n=16), leaf anatomy, ecology and taxonomy are examined.
Considerazioni citotassonomiche e corologiche su Allium chamaespathum Boiss. (Alliaceae) geofita nuova per la flora italiana.
2010
Oggetto di questo studio è una singolare popolazione di Allium a fioritura autunnale, rinvenuta presso Reggio Calabria (Italia meridionale), la quale, per alcune caratteristiche vegetative e fiorali, rientra chiaramente nella sezione Allium. Le piante sono caratterizzate da un habitus robusto, foglie subcilindriche ampiamente fistolose, spata unica, caduca, slargata, con appendice fistolosa, lacerantesi lateralmente, infiorescenza globosa, densa, perianzio cilindrico con tepali conniventi, stami con filamenti laminari, dimorfi, gli esterni semplici e gli interni tricuspidati, e ovario con nettari ben sviluppati. Oltre alla fioritura tardiva (IX-X), gli individui di questa popolazione, prese…
Il genere Allium (Alliaceae) in Sicilia
2008
41a Escursione Sociale, Parco Alto Garda Bresciano, 23-26 Giugno 1999.
2000
Biodiversità e stenocoria all’interno delle diverse classi di vegetazione dei monti Peloritani: l’effetto dell’azione umana sugli spettri biologici e…
1998
Il bacino del Garda fu colonizzato dall'uomo sin dal Neolitico. Uno studio floristico effettuato tra il '92 ed il '94 lungo la sponda bresciana su una fascia compresa tra 0 e 100 m sul livello del lago, ha permesso di evidenziare le relazioni esistenti tra l'attività umana e la distribuzione di determinati contingenti floristici nell'area anzidetta. Gli interventi umani più evidenti sono stati i seguenti: * Bonifica, drenaggio o diserbo delle zone umide. Sostituzione con colture irrigue od attrezzature balneari. * Elimina-zione dei boschi ascrivibili all'ordine dei Populetalia albae dalle conoidi di deiezione e dalle sponde moreniche subpianeggianti a sud del bacino. Sostituzione con prati …