1,721,030 research outputs found
Atlas Florae Europaeae. Distribution of Vascular Plants in Europe. 16. Rosaceae (Cydonia to Prunus excl. Sorbus)
No full textEurope maps of Rosacea
Vicia incisa (Fabaceae). Taxonomical and chorological notes
Full text linkThe classification of the Vicia sativa aggregate is unsatisfactory. Concerning the taxonomic value and choice of rank of some of these
taxa, there are disagreements among botanists. Vicia incisa, which was originally described at species level, was mostly treated at subspecies rank
of V. sativa. However, chemical and molecular data pointed out that this taxon, not only should be treated at species rank, but it should be removed
from the group of V. sativa, being more related to V. barbazitae, V. grandiflora, and V. sepium. Based on morphometric measurements and cultivation
tests, as well as nomenclatural investigations, the present research was carried out with the main aim to define the better taxonomic rank for the
studied taxon. The results obtained support the published molecular data concerning both the recognition of the studied taxon at species level and the
morphological similarity among V. incisa, V. barbazitae, V. grandiflora and V. sepium
Flore regionali e note tassonomiche su gruppi critici dell'Italia centrale
No full textFlore regionali e note tassonomiche su gruppi critici dell'Italia central
The segetal flora of Italy: an occurrence dataset from releves in winter cereals and allied crop types
Full text linkThe segetal flora of winter crops includes mostly native or archaeophyte annual species that are often strong specialists of their habitats. Threatened by the intensification of agriculture, segetal flora is particularly valuable from a perspective of biodiversity conservation and evolution. Moreover, it contributes to maintain biodiversity in agroecosystems and provides several ecosystem services. The dataset here described was set up to provide the first inventory of the segetal flora of Italian winter cereal crops and allied crop types, the latter including flax and autumn-sown legumes. It includes 24,676 georeferenced occurrence data deriving from 1,240 floristic and phytosociological relevés. The data were collected from the greater part of Italian territory, in a temporal range spanning from 1946 to 2018
Erbario Anzalone: a collection of RO Herbarium with a great importance for the floristic knowledge of Lazio region
No full textThe Herbarium Museum of Sapienza University of Rome (RO) hosts over one million specimens, in several historical and contemporary collections. It is divided into six main Herbaria (Erbario Romano, E. Generale, E. Cesati, E. Montelucci, E. Anzalone, E. Bazzichelli), and several minor collections (1). The computerized cataloging of RO Herbarium collections, carried out for many years (2, 3), has produced a Filemaker Pro relational database (4), which hosts also georeferenced data from literature, and fields surveys. Databases allow various analyses on data, e.g. the taxonomic composition of the collections, their temporal and geographical coverage, and collectors’ activity. At the same time, catalogues of the collections and floristic atlases can also be produced. Erbario Anzalone is a relevant collection for the knowledge of the flora of central Italy. Bruno Anzalone (1921-2007), full professor from 1974 to 1996 at Sapienza University of Rome, is considered the greatest expert of regional flora in Lazio. The collection, placed in the Erbario Romano room of the Museum, hosts about 37,700 specimens of vascular plants. It is organized in 361 parcels, and arranged in alphabetical order according to family, genus, and species; the delimitation of families and genera follows Pignatti (5). The specimens collected in Lazio are separated from those collected in other areas. The specimens collected by Anzalone in the Abruzzo, Lazio and Molise National Park are kept in a separate collection (43 parcels). The computerized cataloging of the materials, carried out from 2003 to 2014 with the supervision of the herbarium staff, was completed also thanks to the work of students, as the collection is also used for educational purposes. The nomenclatural update (6, 7) and the georeferencing of the materials is currently underway.
The specimens belong to 180 families, and 997 genera. The most represented families are Asteraceae (4,539 specimens), Fabaceae (3,305), Apiaceae (2,174), Lamiaceae (1,718), Brassicaceae (1,677), Caryophyllaceae (1,470), Scrophulariaceae (1,373), Rosaceae (1,370), Poaceae (1,226), and Ranunculaceae (1,069). The most represented genera are Trifolium (552), Vicia (547), Centaurea (486), Ranunculus (455), Silene (452), Senecio (448), Carex (429), Euphorbia (370), Galium (355), and Quercus (335). Over 98% of the specimens were collected in Italy; 69% were collected in Lazio, 8% Trentino-Alto Adige, 7% Abruzzo, and 3% Marche. Anzalone collected about the 90% of the specimens (33,789); among the other 276 recorded contributors, the most active were Cesare Banchieri (682 specimens from Monte Cairo, Frosinone), Luigi Veri (404 specimens from the Ponziane islands), and Edda Lattanzi (356 specimens from different territories). The oldest specimen dates back to 1920, and the most recent one to 2004.
The composition of the collection reflects the studies carried out by Anzalone throughout his career, testifying his interest in genera such as Astragalus, Centaurea (Fig. 1), Ferula, Pastinaca, Seseli, and the close relationship between Anzalone and his region. His intense activity, uninterrupted from 1940 to 2004, provided the essential data for drafting the vascular flora of Lazio (8), and for the geolocalised database that RO Museum is preparing (4). Within the database, the Erbario Anzalone provided valuable information on species distribution, useful to perform phytogeographical regionalisations (9), and to map rare, endemic, and endangered taxa (10)
Notula 1429. Lemna minuta Kunth in NEPI C., PERUZZI L., SCOPPOLA A. (eds.), Notulae alla checklist della flora vascolare italiana: 5.
No full text
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
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