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Festschrift for Francesco Maria Raimondo on the occasion of his 70th birthday
Full text linkThis volume is a collection of botanical articles published in honor of Professor Francesco Maria Raimondo to celebrate his 70th birthday and his activity in the field of botany. It contains the contributions of Italian and foreign colleagues on flora and vegetation of the Mediterranean presented at the international conference “Evolution and adaptation of species and plant communities in the Mediterranean environment”, which took place the 26th February 2015 in Florence at the seat of the Italian Botanical Society
Acquisizioni filogenetiche e variazioni tassonomiche in alcune rosacee legnose della flora Italiana
Full text linkIn Italia, secondo la recentissima sintesi di Bartolucci et al., la flora vascolare nativa sarebbe rappresentata da 1092 generi di piante vascolari. Fra di essi ricorre Sorbus L. (Rosaceae) a cui vengono attribuiti 11 taxa specifici e sottospecifici (ivi compresi alcuni taxa ibridogeni) e un dodicesimo taxon da confermare nel territorio italiano. In questo contributo si vuole porre attenzione proprio alla recentissima checklist europea di Sorbus s.l. basata su acquisizioni di carattere filogenetico sul gruppo e, più in generale, sulle Pyrinae. In particolare, si fa riferimento allo studio di Sennikov, Kurtto in cui Sorbus L. viene praticamente smembrato in numerosi altri generi, mentre i taxa totalmente o in parte ibridogeni vengono riferiti ad altri di nuova istituzione. Quest’ultimo trattamento, se accettato, avrà riflessi sulla diversità intergenerica della flora europea e quindi anche di quella italiana che si arricchirebbe così di ben altri 5 generi (Aira, Cormus, Chamaemespilus, Torminalis e Hedlundia). A seguito del nuovo arrangiamento, il taxon generico linneano finisce con il comprendere una sola unità specifica (Sorbus aucuparia). Dunque, il quadro generale della flora europea viene a subire una considerevole variazione introducendo ben 9 generi aggiuntivi fra cui Aira, Cormus, Chamaemespilus e Torminalis nonché i nuovi: Hedlundia, Carpatiosorbus, ×Borkhausenia, ×Ma jovskya e ×Normeyera. Per la flora italiana, le variazioni quantitative sono più a livello generico piuttosto che specifico: 6 generi al posto di uno; 11 taxa specifici e sottospecifici distribuiti in 6 generi piuttosto che in uno solo. Si riporta il prospetto dei generi e dei taxa specifici e sottospecifici correlati a Sorbus s. lato e riferiti al territorio italiano in base al suddetto recente studio
The “manna” extracted from the ash trees still cultivated in Sicily from mythical food to pharmaceutical and nutraceutical resource
Full text link“Manna” is the product obtained from the solidification of the elaborate sap that comes out of the incisions made during the summer season on the stem and on the main branches of some species of the genus Fraxinus (Oleaceae). The cultivation of manna ash trees dates back to ancient times in Sicily and elsewhere ash trees – known as sacred trees, a symbol of abundance and therefore auspicious – was increasingly widespread until the middle of the last century. Subsequently, however, the crop underwent a progressive decline, remaining relegated to restricted areas of Sicily, in particular in the Madonie district (Palermo, Italy). In this brief review, the essential characteristics of the manna and the ash trees from which it is extracted are summarized. The aspects of the current productivity of manna in the Sicilian territory and the implications of a potential recovery and increase of an ancient craft, ash tree cultivation, are also reported in a perspective of sustainable development and green economy for the Mediterranean area and beyond. Finally, the authors remember what has been done to ensure the conservation not only of the active cultivation of manna ash but also of all the relative agro-biodiversity. The conservation of the living germplasm of the ancient cultivars recovered in the Madonie area (Palermo, Sicily) represents one of the most qualifying results
First record of Euphorbia graminea (Euphorbiaceae) in Italy
Full text linkEuphorbia graminea Jacq. (Euphorbiaceae), a species native from Central America through northern South America, from Northern Mexico to Peru, has been found naturalized near Palermo (Sicily). This is the first record for Italy and Europ
Critical forms in Sicilian populations of annual Lysimachia L. (Primulaceae)
No full textBased on recent literature, in the Primrose family the genus Lysimachia L. absorbed Anagallis L. (1). As a result, new name combinations have been introduced for this genus, thus involving the increase of specific and intraspecific taxa (for Italian flora see 2 and 3). A further consequence, focused in this contribution, concerns the binomial combination Lysimachia arvensis (L.) U.Manns & Anderb., which has different synonyms and includes several specific and intraspecific taxa. As far as the taxonomic history of the annual taxa of Anagallis is concerned, different authors preferred to include some of them in A. arvensis and in A. foemina at the level of variety (4) or subspecies (2), while others recognized their specific rank (5, 6, 7). Among these taxa, A. parviflora Hoffmanns. & Link is frequently reported, even included among the synonyms of A. arvensis (5) and then considered as a distinct species (7). The already complex status is further complicated by the occurrence of hybrids, as reported by Pignatti (6). The cited case would regard A. foemina and A. parviflora, but other taxa are also mentioned in literature [cf. Anagallis × intermedia Giraudias = Lysimachia × intermedia (Giraudias) B.Bock [(Lysimachia arvensis (L.) U.Manns & Anderb. × Lysimachia foemina (Mill.) U. Manns & Anderb.]. The analysis of the variability observed in a Sicilian population referable to this group (Fig. 1) revealed a quite critical case, introducing additional variables in the different interpretations of varieties, forms and hybrids of this group of complex species. Plant samples collected in the territory of Palermo particularly showed new colours of the corolla and different dimensions of petals. This recurrence of form and colour observed in the same station for two years, with the presence of congeneric taxa, allows to hypothesize a temporary recurrence of the mentioned features; the authors were induced to interpret this population at variety level or consider it the result of recurringhypothesize a temporary recurrence of the mentioned features; the authors were induced to interpret this population at variety level or consider it the result of recurring hybridization processes. Field researches were extended on this basis and a second population was found in the territory of Misilmeri, near Palermo. Both populations coexist with the best known and widespread A. arvensis (incl. A. phoenicea Scop.) and A. foemina. The possible hybrid origin of the new type – elsewhere reported by amateurs not just in Italy – led to start genetic investigations which are still in progress
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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