摘要:

The author provided a full taxonomic treatment with descriptions, illustrations, herbarium specimens seen, distribution map, keys and relationships of the species ofDamiellaMaire & Weiller (Chenopodiaceae).This genus includes the species belonging toSalsolasect.Damiella(see BRULLO 1982), viz.:D. longifolia(Forsskal) Brullo comb, nov.,D. verticillata(Schousboe) Brullo comb, nov.,D. zygophylla(Batt. & Trab.) Brullo comb, nov.,D. schweifurthii(Solms-Laub.) Brullo comb, nov.,D. cruciata(Chevall. ex Batt. & Trab.) Brullo comb, nov.,D. gymnomaschala(Maire) Brullo comb, nov.,D. cyrenaicaMaire & Weiller,D. glomerate(Maire) Brullo comb, nov.,D. melitensis(Botsch.) Brullo comb, nov.,D. tunetana(Brullo) Brullo comb, nov.,D. sinaica(Brullo) Brullo comb. nov. The genusDamielladiffers from the genusSalsolafor the presence a well developped hypoginous disc, of staminodes alternating with the stamens, of leaves cylindrical or davate articulating at the base with a short coriaceous whitish pulvinus which is ventrally hollowed out and more or less wooly. Whilst it differs from the genusSeidlitzia, with which has close resemblance, for the presence of brances not jointed, leaves articulated on a basal pulvinus, hypogynous disc well developped, staminodes and stamen filaments shortly fused at the base, anthers appendaged, perianth segments equal or subequal enterely or only in the central part membranaceous. Phytogeografical and ecological informations are given too.

ISSN:0083-7792    

DOI:10.1080/00837792.1984.10670309

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

ISSN:0083-7792    

DOI:10.1080/00837792.1984.10670310

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

摘要:

The floristic knowledge of benthic marine algae of southern Italy appears irregular and not yet complete: up to now, in fact, there are large areas not sufficiently studied (e.g. coast of Calabria and Apulia). Nevertheless the availability of quite complete floras of some areas: gulf of Naples, W-Sicily, the Straits of Messina, the northern part of the eastern Sicilian coast, the southern part of the eastern Sicilian coast and the island of Linosa, permits to get an idea of general characteristics of algal flora of this region. This flora appears very rich of species (over 650). The degree of floristic similarity among ten Mediterranean areas (the above mentioned six areas of southern Italy as well as Catalan coast, côte des Albères, Adriatic sea and coast of Greece) was established. A hierarchical clustering of these floras was carried out. The results are expressed in a dendrogram. A noticeable similarity among the floras can be drawn from the dendrogram since they are linked above the 50% level of importance, excepting that of Greece alone (about 45%). A clustering, based on the chorological spectrum of each flora, was also carried out and then depicted in a dendogram which shows a much more marked degree of similarity among the floras. However, two groupes can be individuated, the first on encompassing the flora of the Adriatic sea as well as those of southern Italy (except Messina), the second one all the others.

ISSN:0083-7792    

DOI:10.1080/00837792.1984.10670311

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

摘要:

The absorbtion and accumulation of eight elements were studied in the tolerant lichenCaloplaca aurantia(Pers.) Hellb. These criteria were used for comparative evaluations between relatively unpolluted (rural and suburban) areas and contaminated (urban-industrial) locations.

ISSN:0083-7792    

DOI:10.1080/00837792.1984.10670312

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

ISSN:0083-7792    

DOI:10.1080/00837792.1984.10670313

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

摘要:

The distribution and origins of selected Pteridophyta in the Mediterranean area is discussed. Five main periods and sources are indicated: ancient taxa in Equisetopsida and Lycopodiopsida which had an early Laurasian origin; Polypodiopsida that evolved in deciduous forest of the Northern Hemisphere in Paleocene- Eocene times; elements that arose in the tropics of the Cretaceous-Paleocene flora and developed in the warmer and wetter periods to be residual in the south-west of our area; those later species that secondarily spread from east or south-west Asia. The importance of Gondwanaland as a source of some of the older taxa is also briefly discussed.

ISSN:0083-7792    

DOI:10.1080/00837792.1984.10670314

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

ISSN:0083-7792    

DOI:10.1080/00837792.1984.10670315

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

ISSN:0083-7792    

DOI:10.1080/00837792.1984.10670316

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

摘要:

A discontinuous outline of the history of the climate and of the vegetation in Italy with particular reference to the oceanic warm and dry warm phases is given, bearing in mind some general principles and methods on the macrofossil and pollen record. Various methods from different points of view converge on the same general subject that is deciphering past climates. The results obtained using special parameters are finalized focusing on particular subjects. The oxygen isotope method of estimating paleotemperatures has been widely used on the long oceanic cores where climatic registrations were continuous. But from this method we can obtain global temperatures not sufficient to detect Mediterranean climate. For this purpose the identification of a dry summer is more useful than an annual mean temperature. When we have fossil plants as climate indicators, we will have, perhaps, an adequate tool for investigation of past Mediterranean climates. An integrated method of research provides a useful control through the connection of the optimized results from different sciences.

ISSN:0083-7792    

DOI:10.1080/00837792.1984.10670317

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

摘要:

Moins marquées qu'en Occident, les variations climatiques qui ont eu lieu depuis 100.000 ans au Moyen-Orient ont fortement influencé la flore, particulièrement les fluctuations de l'humidité. Lors des périodes chaudes, interglaciaires, il y a eu des phases très sèches; en Syrie centrale, dans la zone actuellement semi-désertique, les Chenopodiacées étaient, très dominantes. Un arbre, l'Acaciaqui, actuellement, ne dépasse pas la vallée moyenne du Jourdain, a atteint le pied de l'Anti-Liban. Sur le littoral syro-libanais, la végétation était celle de «type batha», dominée parPoterium spinosumavecTheligonum cynocrambeet des Composées. Lors des phases humides, la forêt méditerranéenne se développe avecQuercus calliprinos, Ceratonia, Pistacia, Myrtus, Vitex.Lors des périodes froides, les groupements forestiers du Liban et de l'Anti-Liban descendent en altitude; le cèdre et le sapin augmentent,Ulmus, Fraxinus, Juglans, Carpinus-Ostryas'ajoutent aux chênes de montagne. Très rares et atteignant seulement le Nord du Liban se rencontrent des pollens deBetulaetCorylus.Mais, vers le Sud, deux arbres ont atteint la zone actuelle de la frontière d'Israël:Tilia tomentosaetPterocarya, tous deux étant actuellement totalement absents du Levant. Les phases postérieures, certaines très sèches, amènent à l'état actuel où, malgré l'humidité accrue au début de l'Holocène, l'influence néfaste de l'Homme sur cette région dure depuis 10.000 ans.

ISSN:0083-7792    

DOI:10.1080/00837792.1984.10670318

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor