Search results for " endemic"

Taxonomical remarks on Trifolium savianum Guss. and its relationship with T. uniflorum L.

1996

In the frame of investigations on endemic or rare taxa of the Sicilian flora, Trifolium savianum Guss., a misappreciated species occurring in a small area of Peloritani mountains (NE Sicily) is examined. According to literature data, the species has been considered as a synonym of T. uniflorum L. (Lojacono, 1891; Zohary, 1969; Jafri, 1980; Zohary & Heller, 1984; Greuter, 1989), as a variety (Gibelli & Belli, 1892; Vierhapper, 1919; Fiori, 1925) or as a subspecies of the aforesaid species (Nyman, 1878; Coombe, 1968; Tutin et al., 1968; Pignatti, 1982). The analysis of morphological features, carried out on herbarium and living matherial, has highlighted that T. savianum can be considered as …

Hyacinthoides kroumiriensis sp.nov. (Hyacinthaceae): a new species from North West of Tunisia

2014

Hyacinthoides kroumiriensis El Mokni, Domina, Sebei& El Aouni, a new species in Hyacinthaceae from Kroumiria region, North West of Tunisia, is described and illustrated. Morphological characteristics with illustrations, habitat and description of the new species are provided, in addition to a diagnostic comparison with one phenotypically similar species within the same clade.

Seed germination data of three Hieracium and one Pilosella (Asteraceae) from Sicily and southern Italy

2020

This work reports the first seed germination data of three Hieracium and one Pilosella (Asteraceae) taxa from Sicily and southern Italy. The studied taxa are: Hieracium hypochoeroides subsp. cilentanum, endemic to Campania, H. schmidtii subsp. nebrodense, endemic to Sicily, H. terraccianoi, endemic to Calabria and Pilosella hoppeana subsp. sicula, endemic to Sicily. The obtained results showed that the investigated taxa produce non-dormant seeds, with a high percentage of germination at all tested thermoperiods (15°C to 25°C and the alternating temperature of 25/15°C). Germination tests carried out in gibberellic acid (GA3) provided similar germination percentages. The data presented in thi…

Seed germination reports of high mountain species native to Mount Etna (Sicily)

2020

The germination ability of five endemic species from the high mountain belt of Mt. Etna were studied; they are Astragalus siculus, Erysimum etnense, Senecio squalidus subsp. aethnensis, Silene italica subsp. sicula, and Tanacetum vulgare subsp. siculum. Mature seeds were collected in the field, within an elevation range of 1700–2000 m a.s.l. Different experimental conditions were tested and the best methods with optimal germination results are provided and compared for each species. First germination records are given for 4 out of 5 of the investigated taxa.

La corretta citazione del nome "Cytisus aeolicus" (Fabaceae), e sua tipificazione

1999

New insular taxa from the oldest Terre Rosse fissure filling (Gargano, Southeastern Italy).

2012

A rich amount of fossil remains of a highly diversified vertebrate fauna, known as “Mikrotia fauna”, has been retrieved from the red soil deposits (Terre Rosse) which fill the extensive palaeokarst network that affects the Mesozoic limestone along the north-western slopes of Mount Gargano (Southern Italy). The faunal assemblages reveal a rather complex history of bioevents such as dispersals and extinctions, which occurred when the area was isolated. These reconstructions were based on the materials collected during the seventies and the eighties of the last century. Forty years after its discovery, the Gargano Terre Rosse finally yielded evidence of an older faunal settlement. The peculiar…

Morphological characterization, germination ecology and conservation of narrow endemic plant species of the Aeolian Islands (Sicily)

2016

This stusy is focused on four narrow endemic species of the Aeolian fora: Anthemis aeolica, Erysimum brulloi, Cytisus aeolicus and Silene hicesiae. Morphological characterization of seeds, seed germination and dormancy regulation have been investigated for these species.

Conservation genetics of an endemic from the Mediterranean Basin: high genetic differentiation but no genetic diversity loss from the last population…

2013

The Mediterranean Basin is a biodiversity hotspot, housing > 11.000 narrowly endemic plant species, many of which are declining due to mass tourism and agricultural intensification. To investigate the genetic resource impacts of ongoing habitat loss and degradation, we characterized the genetic variation in the last known populations of Leopoldia gussonei, a self-compatible endangered Sicilian Grape Hyacinth numbering less than 3,000 remaining individuals, using AFLP. Results demonstrated significant genome-wide genetic differentiation among all extant populations (I broken vertical bar(ST) = 0.05-0.56), and genetic clustering according to geographic location. Gene diversity was fairly c…

At the intersection of cultural and natural heritage: Distribution and conservation of the type localities of Italian endemic vascular plants

2017

Abstract We conducted a GIS spatial analysis with the aim of providing the first quantitative large-scale overview of the distribution patterns of 1536 type localities ( loci classici ) of 1216 Italian endemic vascular plants and their relationship with a set of descriptive variables. Whereas some variables were used to model the presence-absence distribution patterns of the type localities for the whole set of endemics as well as for the subset of narrow endemics, others (e.g., presence inside or outside protected areas and Italian Important Plant Areas) were considered with the purpose of assessing potential assets or risks for conservation. The largest number of type localities was found…

Pyrus ciancioi (Rosaceae), a new species from Sicily

2012

A new species of Pyrus L. from the Nebrodi Mountains (NE Sicily) is described, named, and illustrated. It differs from P. spinosa in the shape and diameter/length ratio of its fruits and in the width/length ratio of the leaf lamina. An analytical key to the Pyrus species growing in Sicily is provided.