Search results for " herbarium"

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…

A web collaborative project to store and map botanical data

2013

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…

The impact of Information Technology on the identification of species and archiviation of taxonomic and floristic data.

2007

In plant taxonomy, classification aims at reconstructing an evolutionary history, usually represented by means of phylogenetic trees. The approach followed by the classification is hierarchical, and rather in coherence with the dichotomies traditionally used for identifying a certain species. But classification and identification are different, since the latter just aims at finding the name of a specimen, eventually in order to get information on it. There are many ways to identify a specimen: to trace it back to its origin, by following the bifurcations of its phylogenetic tree is one possibility, but not always the easiest and quickest one. This theme has been touched during the symposium…

Assessment of the conservation status of the mat-forming lichens Cladonia subgenus Cladina in Italy

2015

Cladina species are likely to suffer the impact of human pressure, resulting in a potential, as well as currently unknown, extinction risk for some of them. In this study, we used herbarium specimen data and literature data combined with geographic information system (GIS)-based analyses to assess the threatened status of Italian Cladina species according to IUCN criteria. A total of 485 records, reported during the period 1833–2013, were evaluated. Biological traits, habitat requirements and distribution patterns were used to infer species extinction risk. Extent of occurrence and area of occupancy have been calculated at the national scale, based on a 2 km × 2 km cell grid. The potential …

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.

TAXONOMIC, ECOLOGICAL AND CHOROLOGICAL REMARKS ON CLINOPODIUM MINAE (LAMIACEAE), CRITICAL AND RARE PLANT OF THE SICILIAN FLORA

2017

In a previous contribution (1) the finding in the wild of Clinopodium minae (Lojac.) Peruzzi & F.Conti [Bas. Calamintha minae Lojac.], a critical species close to Clinopodium corsicum (Pers.) Govaerts and well distinct from Clinopodium alpinum (L.) Kuntze subsp. nebrodense (A.Kern. & Strobl) Bartolucci & F.Conti was reported. It is a critical taxon, described by Lojacono, author of the most extensive work on the Sicilian flora (2) based on the examination of the collections of the Herbarium of Palermo (PAL!) (3). In the above cited note, the specific characters as well as the taxonomic relationships with other taxa were highlighted. At the same time, the location of a small population of C.…

Typification of five plant names described based on specimens collected by Józef Warszewicz in Central and South America.

2022

Józef Warszewicz (1812–1864) was one of the first Polish naturalists to explore the flora of the tropical New World. During two expeditions to Central and South America (1844–1850 and 1850–1853) he collected and delivered to Europe up to twenty thousand plant specimens. To honour his service and his achievements in plant collections, different taxonomists described more than 100 taxa using the surname Warszewicz, for example in the genus name (Warszewiczia) and the species epithets (warszewiczii, warscewiczii, warszewicziana). Unfortunately, a large part of Warszewicz’s collection of plant species deposited in the Berlin Herbarium (B), including many type specimens was destroyed during Worl…

Supplementary material 1 from: Nobis M, Klichowska E, Wolanin M, Nobis A, Nowak A (2022) Typification of five plant names described based on specimen…

2022

Table S1