Search results for " tax"

An updated overview of invasive Caulerpa taxa in Sicily and circum- Sicilian Islands, strategic zones within the NW Mediterranean Sea

2017

The spread dynamics of invasive Caulerpa taxa (i.e. Caulerpa cylindracea, C. taxifolia var. taxi- folia and C. taxifolia var. distichophylla) in Sicily and circum-Sicilian Islands, based on relevant publications, grey literature, unpublished data and in situ observations during the last 23 years, is presented here and discussed. Their known distribution is mapped. New records are also reported. Transport-stowaway is considered the most plausible vector of introduction of invasive Caulerpa in the area. The three invasive taxa showed different spread dynamics. Caulerpa cylindracea and C. taxifolia var. distichophylla, behaved as highly successful and fast-spreading taxa, i.e. as true invasive…

The role of herbaria for taxonomic and distributional studies in Characeae: examples from the Herbarium Mediterraneum Panormitanum (PAL) and the Flor…

2018

Characeae is a taxonomically critical family. Taxonomical uncertainties inevitably affect its distributional data. The role of herbarium specimens, particularly types and original material, is crucial for unravelling taxonomical ‘knots’. Moreover, wet areas have undergone dramatic reduction and modification in the last century and historical herbarium specimens may represent basic documents for the reconstruction of former distributions. Some preliminary data from two different Italian Herbaria are here presented. The Herbarium Mediterraneum Panormitanum (PAL, the standard acronym according to the Index herbariorum, http://sweetgum.nybg.org/ ih) houses four folders of Characeae exsiccata. T…

Flora Mediterranea

2016

This peer-reviewed journal, published annually on behalf of OPTIMA, includes papers dealing with the study of biogeography, floristics and systematic botany in the Mediterranean area.

Flora Mediterranea 28

2018

This is the volume 28 of the peer-reviewed journal, published annually by the Foundation pro Herbario Mediterraneo on behalf of OPTIMA, includes papers dealing with the study of biogeography, floristics and systematic botany in the Mediterranean area.

Proposal to conserve the name Orobanche foetida (Orobanchaceae)

2015

In this Proposal we formally propose to conserve O. foetida with Bourgeau’s gathering of 16 April 1856 as conserved type. Our choice rests on the following reasons: (1) it clearly represents the current usage of the name O. foetida; (2) it is based upon material from northern Algeria not far from the Algerian-Tunisian border where the ranges of the two species overlap and in a region broadly coincident with the original terra classica of Poiret’s name; (3) the proposed conserved type is readily accessible online in a remarkably detailed digitization; (4) the sheet contains a sample of the host plant, which proves to be a non-shrubby Fabaceae (presumably Medicago laciniata (L.) Mill.) and th…

Stipa valdemonensis (Poaceae), a new species from Sicily

2012

A new species of Stipa, endemic to Sicily, is here described and named Stipa valdemonensis. The new taxon is related to S. crassiculmis. Owing to the small number of individuals observed, in few restricted localities only, it is assigned the IUCN threat status “vulnerable”

The genus Capparis L. (Capparaceae) in Laos and Cambodia

2023

SummaryA taxonomic revision of the genus Capparis in Laos and Cambodia was undertaken. Based on examination of historical and recent herbarium collections coupled with field investigations, 25 species and 7 intraspecific taxa, all belonging to sect. Monostichocalyx, were recognised in the study area. Among these, a new species, C. averyanovii, and a new subspecies, C. acutifolia subsp. thamphae, from central and northern Laos are described and illustrated. A key to the species is provided, along with descriptions, synonyms, distribution ranges, autecological and phenological data, and 31 lectotypes are selected. When available, vernacular names and traditional uses of the species are also g…

Contributo alla Flora Critica d'Italia: le specie del genere Isoetes

2013

Isoetes L. In: Raab-Straube E. von & Raus Th. (ed.): Euro+Med-Checklist Notulae, 3 [Notulae ad floram euro-mediterraneam pertinentes 32]

2014

CONSERVATION STATUS ASSESSMENT OF THE ENDEMIC HIERACIUM S. STR. (ASTERACEAE) OCCURRING IN SICILY

2022

The current status of the majority of apomictic taxa, and therefore their priorities for conservation, are poorly known, and consequently, they are neglected by conservationists. In Sicily 8 species and 4 subspecies of Hieracium s. str. occurs. Eleven taxa are endemic to the area, one has a wider distribution. These taxa were not evaluated within the recent project “Red List assessment of plants and fungi in Italy” because collectively considered with insufficient and unreliable distribution data. The global conservation status of the endemic Hieracium s. str. taxa occurring in Sicily was assessed here using the IUCN categories and criteria, on the basis of the data collected during field s…