1,721,103 research outputs found
Carta fisionomica della vegetazione del Parco naturale dei Monti Aurunci (scala 1:25.000)
No full textCarta della vegetazione scala 1:25:000 su carta e CD-ro
A nomenclatural survey of the genus Amaranthus (Amaranthaceae) 9: names published by Roxburgh
Full text linkA nomenclatural study of the names in Amaranthus published by W. Roxburgh was carried out. Seven names appear to have been published by the author, three being not valid from the nomenclatural point of view (Amaranthus atropurpureus, A. fasciatus, and A. lanceofolius, nomina nuda, Arts. 38.1 and 38.2 of ICN). The remaining four names are valid and they are typified by illustrations included in "The Roxburgh Collection" at the library of the Royal Botanic Garden of Kew [Nos. 447 (lectotype of A. fasciatus), 1676 (lectotype of A. lanceolatus), and 1677 (lectotype of A. frumentaceus)] or included in the Seikei Zusetsu Agricultural Catalog (neotype of A. atropurpureus)
Does the alien L. minuta show an invasive behaviour outside its original range? Evidence of antagonism with the native L. minor L. in Central Italy
No full textThe American duckweed Lemna minuta Kunth is considered an invasive species in several European countries (e.g., Belgium, Germany, Hungary, Ireland, Italy), but its invasiveness outside its original range remains poorly studied. We therefore analyse: (i) the speed with which L. minuta has spread throughout Europe; and (ii) its capability to compete with L. minor L., the most common European native duckweed. Based on literature data, the increasing number of observations of L. minuta since it was reported for the first time in France (1966) indicated the wide extent reached by this species in most of Europe, highlighting its high capacity to colonize new areas. By samplingLemna populations from 41 stations in standing waters in Central Italy, it emerged that the frequency of the two species was similar, but the alien species was more abundant than the native one, showing generally higher coverages, and predominating in mixed Lemna populations. A negative correlation between L. minuta and L. minor was observed in our study. This relationship was not explained by different ecological requirements, since the two species responded similarly to the main environmental gradient, but was linked to an antagonistic dynamism between both species. A multitemporal analysis, based on the comparison of Lemna coverage data recorded at the same stations at two different times (last vs. first record), revealed that L. minuta had appeared where it had been absent previously and that its abundance had increased to the detriment of L. minor, which in some cases disappeared within a few years. The arrival of L. minuta in a site can be considered a real threat to conservation of the native plant diversity due to its competition with the congeneric L. minor
Epitypification of the Linnaean Statice echioides (Plumbaginaceae) and notes on Smith’s concepts of S. aristata and S. rorida
No full textThe typification of the Linnaean name Statice echioides (currently Limonium echioides) is discussed. An illustration from Magnol's Botanicum Monspeliense (“Limonium minus annuum bullatis foliis vel echioides”) was correctly designated as lectotype by Erben in 1978 according to Art. 7.11 of Shenzhen Code. However, this image lacks some of the important flower characters required for a critical identification of the species. An epitype (plate no. 299 in Sibthorp & Smith's Flora Graeca) is selected to serve as an interpretative type of the lectotype of S. echioides (Art. 9.6). In addition, the name S. aristata, published in Sibthorp & Smith's Flora Graecae prodromus, is discussed in depth and lectotypified on the above-mentioned Magnol illustration, making this name homotypic with the Linnaean one. Finally, the concept of S. echioides, as described in Flora Graecae prodromus, is discussed, concluding that it refers to the currently recognized Limonium roridum (≡ S. rorida, as originally published in Flora Graeca)
Italian alien species in Caryophyllaceae. Nomenclatural remarks
No full textThe typification of the names Cerastium biebersteinii, Dianthus glumaceus, D. plumarius, Gypsophila collina, and G. elegans is discussed. Specimens from the herbaria G, LE, LINN, and P are designated as lectotypes, or neotype (G. elegans) of the concerned names
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No full textAs part of ongoing studies on the family Araceae, and of the Italian Loci Classici Census project, the typification of the Linnaean names Arum arisarum (Arisarum vulgare) and A. tenuifolium (Biarum tenuifolium s.str.) is discussed. An image of L'Obel's Arisarum latifolium and a BM specimen are designated respectively as the lectotypes. An epitype (deposited at HFLA) is also designated for A. tenuifolium subsp. tenuifolium
Studies on the genus Atriplex (Chenopodiaceae) in Italy. IX. Atriplex mollis and note on its occurrence in continental Europe
Full text linkThe typification of the name Atriplex mollis, validly published by R. L. Desfontaines in Flora Atlantica, is discussed. A specimen deposited at G (barcode G00386803) is designated as the lectotype of the name. The distribution in Europe of the species is also discussed. It was indicated for Sardinia only (Italy, Southern Europe) in a single locality (San Paolo pond, Cagliari Province). No specimen that proves the occurrence of the species in Sardinia is in extant. Moreover, the overlapping of a map published in 1912 and the current satellite images, allowed to verify that the area in which A. mollis grew up, including wetlands at the beginning of the XX century, is currently almost totally covered by buildings and commercial/industrial sites. In other words, the habitat where the species occurred was destroyed. As a consequence, at the current state of knowledge, the species is here assessed as extinct (EX) at national level according to the IUCN categories
Dysphania Anthelmintica (Amaranthaceae), New to the Non-Native Flora of Italy, and Taxonomic Considerations on the Related Species
No full textNomenclature survey of the genus Amaranthus (Amaranthaceae). 10. What is Amaranthus commutatus?
No full textThe name Amaranthus commutatus, originally validated by Kerner for a plant taxon from Hungary and Slovakia, was studied as part of a series of contributions with the final aim to clarify the complicated nomenclature of the genus Amaranthus. On the basis of the protologue, the name Amaranthus commutatus cannot be associated with any European species, while out of Europe, Kerner’s original data of A. commutatus may match the morphology of the Australian species A. rhombeus. Unfortunately, no original material has been traced so far and thus no lectotype can be designated (Arts. 9.3 and 9.4 of Shenzhen Code). Consequently, neotypification is desirable according to Art. 9.8. However no specimens of Amaranthus seen by Kerner have been traced and it was very difficult to understand Kerner’s concept of that taxon. Having no suitable specimens available, I prefer to avoid the designation of a neotype, and the possible synonymization of A. commutatus with A. rhombeus based just on Kerner’s data. Furthermore, the synonyms cited by Kerner in the protologue [Amaranthus blitum var. polygonoides (here lectotypified on a specimen preserved at K), and A. blitum var. prostratus (lectotype designated by Iamonico in 2016 on a Balbis’ illustration] refer to other species, i.e. A. albus (new proposed synonymy) and A. deflexus, respectively. The treatment of Amaranthus commutatus appears inconsistent but this fact is not ground for rejecting of the name since does not threat any other name and there are no disadvantageous nomenclatural changes (Art. 56.1). Since the failure to properly designate a type, and the impossibility to reject A. commutatus, Kerner’s name continues to be of ambiguous nature and is proposed as listed as a name incertae sedis.
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