摘要:

Palynology is at the moment the most important source of information in the field of vegetation history. The history of especially the flora forms part of the aims of phytotaxonomy. Between the two approaches large discrepancies exist, for instance identification levels of objects of study, datability of historical records and processing of material. Mutual support includes identified reference material from the side of phytotaxonomy and tracing of some pollen types from plant or tree species that have no relatives in the Mediterranean, from the side of palynology. Numbers of pollen types derived from the plant species represented in the floral record reduce taxa to 3–25% in the Balkans. For example the use of pollen as indicator of human activity in prehistory is handicapped by the identification level. Still, such pollen types may have indicative value. The history of floral elements, identified up to species level and thus of interest also for phytotaxonomy, seems to be restricted to a few tree species.

ISSN:0083-7792    

DOI:10.1080/00837792.1984.10670319

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

ISSN:0083-7792    

DOI:10.1080/00837792.1984.10670320

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

摘要:

The role of chromosome variation in the differentiation of several Iberian angiospermous groups (SileneL.,LinariaMiller,AnchusaL.,ReichardiaRoth,CirsiumL.,CarduusL. andAlliumL.) is reviewed. Two main processes are exemplified: morphological diversification without change in chromosome number, and variation in chromosome number, both through polyploidy and/or aneuploidy with or without morphological differentiation. The role of hybridization and reproductive systems is also discussed. A common tendency for several groups is discussed: the evolution of annual autogamous thermofilous taxa occupying lowland areas from perennial allogamous orophilous and mesophilous taxa.

ISSN:0083-7792    

DOI:10.1080/00837792.1984.10670321

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

ISSN:0083-7792    

DOI:10.1080/00837792.1984.10670322

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

摘要:

The Old WorldLupinusrepresents a unique group of annual species characterized by special distribution pattern, chromosomal diversity, and limited morphological and enzymatic polymorphism. This group is rather heterogeneous and might be divided into two entities: One of rough-seeded related taxa and another of smooth-seeded assemblage of distinct species. These 2 entities differ in several characters: (1) Distribution (principally Mediterranean and sympatric smooth-seeded species vs. mainly subtropical and allopatric rough-seeded ones); (2) Morphology (particularly traits of corolla, pods and seeds); (3) Specific protein polymorphism (the smooth-seeded species being more monomorphic, as judged from isozyme electrophoretic patterns); (4) Alkaloid composition; (5) Chromosome numbers (averagely lower in the rough-seeded complex). Altogether, the smooth-seeded species show more resemblance to their American counterparts.

ISSN:0083-7792    

DOI:10.1080/00837792.1984.10670323

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

摘要:

Available data on philetic relationships within theL. vulgflreaggregate polyploid complex are summarized and the role of karyotype analysis as means to polyploid species progenitors identification, is briefly discussed.

ISSN:0083-7792    

DOI:10.1080/00837792.1984.10670324

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

摘要:

This further contribution to the Palynological Italian Flora deals with eight entities of the Sicilian Flora, some of which are endemic of the Sicilian floristic sector and some of the Pelagic Maltese one. Palynological cards show pollen features observed by light and scanning electron microscopy.

ISSN:0083-7792    

DOI:10.1080/00837792.1984.10670325

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

摘要:

The very different types of taxonomic information normally included in monographs and Floras can now be manipulated by computer: nomenclatural data, morphologicaldescriptions, phytochemical records and geographical distributions. These types of data have been entered into theVicieaeDatabase for species in theLeguminosaetribeVicieae.Example output for Sicilian species illustrate that these data types have different inherent structuretion by computer.In: R. ALLKIN and F.A. BISBY (eds.),Databases in Systematics.Systematics Association Special Volume, No. 26: 263–278. Academic Press, London and New York. ALLKIN R., MACFARLANE T.D., WHITE R.J., BISBY F.A. and ADEY M.E., e a single program, purpose built for taxonomists, which handles data of the different types, fulfils the several taxonomic functions and is easy to use. This program will enable taxonomists to provide a far more sophisticated and flexible information retrieval service than existinf, programs allow.

ISSN:0083-7792    

DOI:10.1080/00837792.1984.10670326

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

摘要:

This is the first in a series of papers on the presence of type-specimens in Willkomm's Herbarium. This Herbarium is a 19th Century plant collection for the Mediterranean area. It was organized by Prof. H.M. Willkomm. It is kept at the Botany Institute of Coimbra University, Portugal (COI). Throughout the preliminary work leading to the creation of a database for this Herbarium, many specimen-«Typus» for taxa described by Willkomm or other botanists, are being sorted out. In this paper I report on several of these type-specimens for infrageneric taxa ofCentaureaL.

ISSN:0083-7792    

DOI:10.1080/00837792.1984.10670327

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

ISSN:0083-7792    

DOI:10.1080/00837792.1984.10670328

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor