Search results for "Botanica"

Allium achaium Boiss. & Orph. ex Boiss. (Alliaceae), a critical species of Greek flora

2011

Allium achaium Boiss. & Orph. ex Boiss. (Alliaceae), a critical and misappreciated species of Greek flora is investigated from taxonomic point of view and illustrated. It belongs to A. sect. Codonoprasum and shows close relationships with the taxa of the A. stamineum Boiss group. Besides, its karyology, ecology and distribution are examined.

Allium makrianum (Alliaceae), a new autumnal species from Greece

2010

Allium makrianum is described as a new species growing on the limestone of the Chios, north-eastern Aegean island (Greece). It is a very rare autumnal geophyte, showing some relationship with A. archeotrichon from Rhodos. Its iconography, morphology, chromosome number (2n=16), leaf anatomy, ecology and taxonomy are examined.

Phylogeny of the autumn-flowering species of A. sect. Codonoprasum from the Mediterranean region.

2009

Il genere Allium (Alliaceae) in Sicilia

2008

Amaurodon mustialaënsis (Basidiomycota, Thelephoraceae) new to Italy

2014

Amaurodon mustialaensis is reported for the first time from Italy. Based on Italian specimens, a brief description, microscopical and macroscopical photographs, ecological and distributional data of this rare taxon are presented.

Come un tenero virgulto: termini e ideologie della crescita nel pensiero greco pre-aristotelico

2020

Dopo un inquadramento terminologico atto a presentare le più comuni radici che esprimono in greco antico i concetti di crescita e di sviluppo del vivente, l’attenzione è rivolta alle modalità con cui in testi di varia natura e datazione (da Omero sino al Corpus ippocratico) si descrive la crescita dell’essere umano a partire dal costante confronto con il mondo vegetale, in modo che dal configurarsi delle teorie possano risaltare le più o meno implicite mentalità. Attraverso il massiccio ricorso al ragionamento analogico, le fonti considerate permettono di farsi un’idea non solo del processo di crescita in sé, ma anche del ruolo assegnato nella cultura e nel pensiero della Grecia antica alla…

Effect of number of seed parents on the genetic diversity of artificially regenerated stands of holm oak

2007

Artificial populations of holm oak (Quercus ilex L. s.l.) and their natural seed origin populations selected from Andalusia (Southern Spain) and Sicily (Southern Italy) were analysed with six nuclear microsatellite loci to explore the effect of seed collection methods. Low effective allele numbers (3.07-6.67) and extremely low effective populations sizes (35.4-102.9) were detected in both reforestation stands, probably due to an inappropriate forester seed collection strategy limited to a few mother trees. Analysis of simulated progenies showed that optimal sampling size to obtain seed collections genetically similar to the origin populations should range from 20 to 50 individuals, but coul…

First overview on the 4th Annex I Habitats Report in Italy: methods, criticality, results and future prospects

2019

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Morphology, anatomy and germination response of heteromorphic achenes of Anthemis chrysantha J. Gay (Asteraceae), a critically endangered species

2011

[EN] This study demonstrates that Anthemis chrysantha, a 'Critically Endangered' annual plant, produces two morphs of achenes: white and dark achenes, which differ in size, mass, anatomy and germination behaviour. Fresh white achenes germinated at all temperatures assayed from 10 to 25 degrees C in both continuous darkness and 12-h photoperiod, ranging between 24% at 25 degrees C in darkness and 89% at 12/20 degrees C in light, whereas fresh dark achenes did not germinate under any temperature or light conditions. To identify differences in dormancy type between the two morphs, germination of dry-stored achenes, and achenes stratified at 5 or 25 degrees C for 2 months were tested in both da…

Recent and new taxonomic acquisitions in some native genera of Asteraceae from southern Italy and Sicily

2021

After a brief review of the recent acquisition in some native genera of family Asteraceae from southern Italy and Sicily, a new endemic species of Anthemis (sect. Hiorthia) is described from Sicily and named Anthemis parlatoreana. The locus classicus of the new taxon, falling in the NW Tyrrhenian coast of the island (Castellammare del Golfo, Trapani), coincides with that of Ptilostemon greuteri, another endemic very rare species of the Sicilian flora. Data on the morphology, distribution, ecology and conservation status of the new species are provided. The taxonomic relationships with the other Sicilian taxa of the same section, in particular A. cupaniana, are also analyzed. The simultaneou…