Search results for "sistematica"
showing 10 items of 815 documents
The genus Pleurotus in Italy
2015
On the basis of personal observations, herbarium specimens and, data reported in the literature the authors report morphological, ecological and distributive data on Pleurotus taxa from Italy. New descriptions are here provided based on the most distinctive-discriminating eco-morphological characters of twelve Pleurotus taxa.
Fixed oil from seeds of narrow-leaved ash (F. angustifolia subsp. angustifolia): Chemical profile, antioxidant and antiproliferative activities.
2019
Fraxinus angustifolia subsp. angustifolia is a plant with an age-old use for the production of manna. However, it is also a valuable source of fixed oil rich-seeds. In the present study we examined the chemical and biological properties of this oil in order to support a possible application in foodstuffs, nutraceuticals and cosmetics. Fatty acid composition, volatile and phenolic substances were evaluated. Oleic and linoleic acid represented 45.5% and 50.0%, respectively, of the total fatty acid composition. Among polar phenolic substances identified (secoiridoids, phenylethanoid glycosides, phenolic acids and alcohols, flavonoids, coumarins) isoverbascoside is for the first time reported i…
Karyological data of three Hieracium (Asteraceae) from Sicily and South Italy
2021
Chromosome numbers are given for three endemic Hieracium taxa from Sicily and Campania (Southern Italy). All the examined taxa resulted triploid (2n = 3x = 27). The triploid chromosome set found in the population of H. pallidum from Rocche dell’Argimusco (Peloritani Mountains, NE-Sicily) differs from the previous counts (2n = 4x = 36) reported for the same species from its locus classicus (Mt. Etna).
Up-to-date report on the distribution ofHelianthemum lippii(Cistaceae) in Italy
2015
An up-to-date report on the distribution of Helianthemum lippii in Italy is provided also on the basis of the findings by Lojacono-Pojero in 1889 who reported the existence of a relic population in Sicily (southern Italy), which is now thought to be extinct because of human disturbance. Field excursions permitted to confirm the locus classicus reported by Lojacono-Pojero as the other Sicilian localities that have been reported more recently. Based on a careful analysis of the literature the presence of H. lippii is currently excluded in Calabria and Apulia. The main causes that threaten the habitat of H. lippii in Sicily are pointed out according to IUCN Threats Classification Scheme.
Poronia punctata, a rare ascomycetes from Italy
2007
Poronia punctata is reported from Sicily as a rare species. Ecological observations in comparison with literature data from Italy and other European countries demonstrated that the rarity of P. punctata should be attributed to environmental factors different from the presence or absence of suitable substrata.
Diagnostico del estado actual de consevación de Puya raimondii en Arequipa – Perù.
2010
The diagnosis of the current state of conservation of Puya raimondii Hams in Arequipa, Perú. – The authors show the results of a survey carried out in Perù, Arequipe region, and Bolivia, on the geographical distribution of Puya raimondii Harms. After describing the systematic and nomenclature of the Andinian species, the study of the biological, ecological and conservation status of this endemic plant species has been performed, as well. They have also described the density population and the risk of genetic erosion caused of both natural and anthropic pressure. Finally they evaluated the use of this plant species as animal feeding, popular medicine traditional local use.
Aspetti macro, micro-morfologici e genetici delle querce caducifoglie afferenti al gruppo di Quercus pubescens s.l. in Sicilia
2011
La suberaie de la Mâamora au Maroc en danger
2013
Pollen morphology and seed germination studies onRetama raetamssp.gussonei, endemic subspecies from Sicily
2013
A study on pollen morphology and seed germination behaviour of Retama raetam (Forssk.) Webb ssp. gussonei (Webb) Greuter, endemic subspecies from Sicily and Calabria, is herein presented, aiming to preserve these populations strongly affected by anthropic pressure.
A contribution to the characterization of Ruppia drepanensis (Ruppiaceae), a key species of threatened Mediterranean wetlands
2021
To elucidate the taxonomic status of Ruppia drepanensis Tineo ex Guss. (Alismatales, Ruppiaceae), we performed morphological analysis and DNA barcoding of historical materials (including the lectotype) and fresh samples (including those from a recently discovered population near the locus classicus in Sicily, Italy). We conclude that R. drepanensis is a separate species, closely related to R. spiralis L. ex Dumort., that occurs in temporary inland waters from the western to central sectors of the Mediterranean region. We also highlight the importance of vouchers and the need to link molecular investigations to field, ecological, and morphological investigations.