摘要:

This paper represents a supplement to theProvisional Catalogue of the family names of living Pteridophytesby the same author published in 1970. It provides further information on some names which will be included in the list of theNomina Familiarum Conservandain Appendix II of the Code of Nomenclature. The paper deals also with the criteria adopted for the conservation of the family names.

ISSN:0083-7792    

DOI:10.1080/00837792.1982.10670221

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

Recent research has shown that the name Pteridaceae cannot be used even if the family is circumscribed in a narrow sense. A Latin description of the family is provided in order that the name Pteridaceae be qualified to be conserved.

ISSN:0083-7792    

DOI:10.1080/00837792.1982.10670222

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

According to Literature, the group ofMicrogonium erosumwould be represented in continental Africa by the following five species, originally described as members ofTricbomanesand still mostly ascribed to it:M. erosum, M. aerugineum, T. palmicola, M. chamaedrysandM. ballardianum.Divergent opinions have been expressed on the identity and taxonomical value of these species; they are mainly due partly to an imperfect knowledge of the types and partly to an erroneous valuation of the importance of the distintive characteristics. The typification of each species is carefully investigated and established; the field of variability of the various characteristics is taken into consideration and the diagnostic value of them is ascertained.

ISSN:0083-7792    

DOI:10.1080/00837792.1982.10670223

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

The following four naturalCheilantheshybrids are described: 1.—C.×teneriffae, the diploid hybrid ofC. maderensisLowe ×pulchellaBory ex Willd. found in Tenerife (Canary Island) which, according to genome analysis (VIDA et al., 1981), is the direct forerunner of the allotetraploid speciesC. guanchicaBolle. 2.—C. × ibericafound in Spain, a triploid hybrid ofC. hispanicaMett. andC. tinaeiTod. which we regard as a backcross of the allotetraploidC. tinaeiwith one of its parents. 3.—C. ×insularis, a tetraploid hybrid ofC. guanchicaandC. tinaeifound on the islands of Corsica, Maddalena and Sardinia. 4.—C.×malacitensis =C. guanchica × pteridioides(Reich.) C. Chr., found in Spain (Prov. Màlaga). The latter had already been synthesized under experimental conditions (VIDA et al., 1981).

ISSN:0083-7792    

DOI:10.1080/00837792.1982.10670224

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

The authors report the somatic chromosome number of 9 species of ferns coming from various localities in Sicily. Six species are diploid (Athyrium filix-femina, Asplenium onopteris, Asplenium obovatum, Dryopteris pallida, Polystichum setiferum, Woodwardia radicans), two tetraploid(Osmunda regalis, Asplenium trichomanesssp.quadrivalens) and one hexaploid(Pteris vittata).Some information on the local ecology and the existing cytological information is given for each species.

ISSN:0083-7792    

DOI:10.1080/00837792.1982.10670225

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

È stato preso in esame dal punto di vista cariologicoAllium moschatumL. proveniente dalla Toscana (Italia) e da Alicante (Spagna). Il cariotipo delle piante provenienti da ambedue le stazioni può essere indicato con la seguente formula: 2n= 16:6m+2ms+2m+2ms+2m+2sts. Dopo brevi cenni sulia morfologia ed ecologia sono discussi i dati cariologici e la distribuzione geografica della specie.

ISSN:0083-7792    

DOI:10.1080/00837792.1982.10670226

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

La pianta maltese precedentemente attribuita adAllium parciflorumViv. viene descritta come specie nuova:Allium lojaconoi.Le due piante si differenziano tra loro abbastanza bene per numerosi caratteri relativi al fenotipo, al cariotipo e all'anatomia fogliare che permettono di separarli a livello specifico. Riguardo alia posizione tassonomica che le due specie occupano nel- l'ambito del genereAllium, viene fatto rilevare che mentreA. parciflorumappartiene chiaramente alia sect.BrevispathaValsecchi em. Garbari et al.,A. lojaconoinon può essere ascritto a questa sezione ma piuttosto deve essere incluso almeno provvisoriamente nella sect.CodonoprasumReichenb.

ISSN:0083-7792    

DOI:10.1080/00837792.1982.10670227

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

Cytological investigations have shown thatIsoëtes malinvernianafrom Albano, Piemonte, Italy is a sexual reproducing tetraploid species withn= 22 paired chromosomes in the spore mother cells of the microsporangia and with 2n= ca. 44 chromosomes in roottip cells. Meiosis, reductional divisions and mega- and microspore development are regular.

ISSN:0083-7792    

DOI:10.1080/00837792.1982.10670228

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

ISSN:0083-7792    

DOI:10.1080/00837792.1982.10670229

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

Viene presentata una revisione sistematica delle specie italiane del genereEragrostisWolf, che in Italia risulta costituito dalle seguenti specie:E. barrelieriDaveau,E. caroliniana(Spreng.) Scribn.,E. cilianensis(All.) Hubbard,E. minorHost,E. pectinacea(Michx.) Nees,E. pilosa(L.) P. B.,E. tef(Zucc.) Trott.

ISSN:0083-7792    

DOI:10.1080/00837792.1982.10670230

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor