Search results for " Sistematica"

Contributo alla conoscenza della distribuzione di Monotropa hypophegea Wallr. (Ericaceae) in Italia

2015

The authors report the distribution of Monotropa hypophegea Wallr. in Italy by the analyses of herbarium specimens, bibliographic references and records in the field. Its national distribution is extended to Tuscany, Marche, Umbria, Puglia Basilicata, Calabria and confirmed for Sicily. Some details concerning morphological characters are also provided to avoid confusion in identification with M. hypopitys L. the other congeneric species occurring in Italy. Furthermore, observations about ecology of these taxa are provided.

The invasion history of Elodea canadensis and E. nuttallii (Hydrocharitaceae) in Italy from herbarium accessions, field records and historical litera…

2022

AbstractWe analysed the invasion history of two North American macrophytes (Elodea canadensis and E. nuttallii) in Italy, through an accurate census of all available herbarium and field records, dating between 1850 and 2019, and a rich literature collection describing the initial introduction and naturalisation phase that supports the results obtained by the occurrence records. Elodea canadensis arrived in Italy before 1866 and had two invasion phases, between the 1890s and 1920s and between the 1990s and 2000s; E. nuttallii, probably arrived in the 1970s, started invading in 2000 and the invasion is still ongoing. Botanical gardens and fish farming played a crucial role in dispersal and na…

The Sicilian wild cabbages as biological resources: taxonomic update and a review on chemical constituents and biological activities

2020

Considering the growing interest that wild brassicas have as sources of bioactive molecules as well as a genetic resource, the authors review and update the taxonomy of Brassica sect. Brassica, limited to the native flora of Sicily, an island considered to be an active diversification center for the group of species of the aforementioned section. Regarding the taxonomic aspects, Brassica tardarae is here considered a subspecies of B. rupestris; the distinction at the subspe- cific level of B. raimondoi, a critical taxon included in B. incana, is also confirmed. In addition, two new subspecies are proposed, respectively in B. incana and B. rupestris. The taxonomic information relating to the…

Typification of the name Senecio pygmaeus (Asteraceae), with some additional taxonomic and phytogeographic remarks

2023

A thorough research on the scientific activity of Guglielmo Gasparrini, Giovanni Gussone and Augustin Pyramus De Candolle allowed the authors to adress a research in several European herbaria looking for the type of the name Senecio pygmaeus DC. The original specimen sent by Gussone and mentioned in the protologue by Candolle is still kept at G-DC and is designated as the lectotype, whilst three other herbarium sheets, preserved at NAP-GUSS, PAL and PAV herbaria respectively, in all probability belong to the same gathering, and are considered as isolectotypes. The authors provide an updated description of this taxon in order to better point out its diagnostic characters. However, further bi…

Isoëtes sabatina (Isoëtaceae, Lycopodiopsida). Taxonomic distinctness and preliminary ecological insights

2021

1) Isoëtes sabatina is the rarest aquatic quillwort in Europe. Although recently found (2013) in Lake Bracciano (central Italy), the species is just one step away from extinction with an estimated population not exceeding 400 individuals and a spatial range of a few hundred square metres. 2) Lake Bracciano is a deep, oligo-mesotrophic Mediterranean volcanic lake that has been subjected to human activities. From January to October 2017, the lake experienced a dramatic water level decrease (up to −1.50 m), which significantly affected the littoral zone and the habitat of I. sabatina. 3) To improve the chances of survival of I. sabatina, the first eco-taxonomic investigation on this species wa…

Bryophytes collected during the 12th “Iter Mediterraneum” (Tunisia, 24 March – 4 April, 2014). First contribution

2015

Part of the bryophytes collected during Iter Mediterraneum XII is listed. Some noteworthy species were found: Dicranella howei, had so far been recorded only doubtfully from Tunisia; Funaria hygrometrica, Grimmia laevigata, Grimmia trichophylla, Imbribryum alpinum, Pogonatum nanum, Rhynchostegium riparioides, Scleropodium touretii, Scorpiurium circinatum, Thamnobryum alopecurum, Timmiella barbuloides, Tortella squarrosa, Tortula muralis and Tortula vahliana, had not been reported from that country for more than half a century.

Seed germination of Thymus richardii subsp. nitidus (Lamiaceae)

2021

The germination ability of the punctual endemic Thymus richardii subsp. nitidus (Lamiaceae) from the Island of Marettimo in W Sicily was studied. Mature seeds were collected in the field. Different experimental conditions were tested and the best methods with optimal germination results were provided. This is the first germination record for this taxon.

First record of Eichleriella leucophaea (Basidiomycota) from Italy

2015

Eichleriella leucophaea Bres., a wood inhabiting heterobasidiomycete, is recorded for the first time in Italy. Fruiting body occurred on branch of Quercus ilex L. Description, distributional and ecological data of this uncommon taxon are here provided.

Emergenze floristiche e vegetazionali delle Madonie

2009

Environmental quality assessment of the Sicilian coast using a multi-disciplinary approach

2018

A multidisciplinary approach for the assessment of the environmental quality of the Sicilian coast is presented. This approach can be adopted for any Mediterranean coastline. The territory was divided into elementary areas and for each of them we reported the most important taxa, belonging to fauna and vascular, bryophytic and algal flora, from a biogeographic point of view in order to evaluate punctual and general levels of biodiversity conservation. The comparative analysis showed that the main circumsicilian islands and the carbonate promontories of the Tyrrhenian coast present the highest degree of biodiversity. The coastal lagoons located in the south-eastern Sicily, even though charac…