摘要:

SummaryA character for a group under study embodies the notion of “similar with respect to a basis for comparison” by inducing a partition of the group into classes called character states. Objects which are members of the same state are considered similar. The information in a character can be measured. This enables us to determine thatSome characters share information with other characters.Some properties may be predicted from knowledge of other properties.Conventional notions of character “equality” and “weighting” are often misleading.In a very real sense, a classification is a character and may be measured for its information preserving capacity.The information in selected characters of the genusArceuthobiumwas analysed in this manner; the results of this analysis are presented.

ISSN:0040-0262    

DOI:10.2307/1218001

出版商:Wiley    

年代:2019

数据来源: WILEY

摘要:

SummaryIt is not possible to define a phragmobasidium or a holobasidium rationally without analysing whether the types of septa present in metabasidia and sterigmata are primary or adventitious. The type of septum formed is related to definite cytological changes. The occurrence of adventitious septa in metabasidia and sterigmata is reported in several species. It is not considered possible to use any combination of Patouillard's criteria of the subclasses Heterobasidiomycetes and Homobasidiomycetes to formulate a new classification of Basidiomycotina into mutually exclusive classes; nevertheless, these criteria remain important at lower levels of classification. Lowy's recent classification is not accepted (Lowy, 1968). Two alternative classifications are suggested.

ISSN:0040-0262    

DOI:10.2307/1218002

出版商:Wiley    

年代:2019

数据来源: WILEY

摘要:

SummaryLindane and dichlorvos vapors are effective in protecting herbarium specimens against insect infestations without associated deleterious effects to humans. Methods of application are simple, protection is long‐lasting, and the toxicants are easily obtainable and relatively inexpensive.

ISSN:0040-0262    

DOI:10.2307/1218003

出版商:Wiley    

年代:2019

数据来源: WILEY

摘要:

SummaryIn the course of an investigation on several exotic species ofAmelanchiernaturalized in Europe, it proved to be necessary to make some corrections in the nomenclature. The most important is the establishment of a new name,Amelanchier lamarckii, for a species widely cultivated and often naturalized in the Netherlands and N.W. Germany, which has been confused hitherto with some other species (such asA. canadensis(L.) Med.,A. laevisWieg., orA. confusaHylander). An extensive discussion of the problems mentioned here is to be found in the publication cited at the end of the article.

ISSN:0040-0262    

DOI:10.2307/1218004

出版商:Wiley    

年代:2019

数据来源: WILEY

摘要:

SummaryAn historical review of the genusFrullaniaRaddi and discussion of its typification are presented.Frullania tamarisci(L.) Dum. is selected as the type species and a type collection is designated. Thus the proper application of the subgeneric nameFrullaniais clarified.

ISSN:0040-0262    

DOI:10.2307/1218005

出版商:Wiley    

年代:2019

数据来源: WILEY

摘要:

SummaryConsiderable confusion has arisen over the validity and content of the generaZonalapollenitesandTsugaepollenites.The problem is discussed and it is concluded that the latter generic name is junior synonym of the former. Since no type species was proposed forZonalapollenitesit is proposed thatZonalapollenites igniculusPotonié ex Pflug 1953 be regarded as type species.

ISSN:0040-0262    

DOI:10.2307/1218006

出版商:Wiley    

年代:2019

数据来源: WILEY

摘要:

SummaryIt is proposed to accept as the correct spelling of generic names in Linnaeus'sSpecies plantarumed. 1 andGenera plantarumed. 5 the spelling appearing in Linnaeus'sPhilosophia botanica(ed. 1, 1751) and to delete Article 74 from the International Code of Botanical Nomenclature.

ISSN:0040-0262    

DOI:10.2307/1218007

出版商:Wiley    

年代:2019

数据来源: WILEY

摘要:

SummaryUnder the present provisions of Articles 19, 22, and 26 of the International Code of Botanical Nomenclature, various taxa between the ranks of family and genus and genus and species and below the rank of species can have two equally correct names without any change whatever in circumscription, position, or rank. This circumstance, which is in direct contradiction to Principle IV and Article 11 of the Code, has come about through too broad extension of the tautonymic principle whereby the names of various taxa which include the nomenclatural type of the next higher taxon must be based either on the same stem as that name or must repeat the name or epithet of the next higher taxon unaltered. This principle works excellently for the names of taxa which include the nomenclatural types of families, genera, and species, respectively, but when extended to all taxa between the ranks of family and genus, to all subgenera and sections, and to all subspecific categories, it results in the possibility for two correct names for some taxa (without change in circumscription, position, or rank), depending solely upon whether or not the next higher rank is used in the taxonomic classification. Since the Code clearly specifies that a taxon can have only one correct name in a given circumscription, position, and rank, proposals are made to restrict the tautonymic principle to the taxa which include the nomenclatural types of families, genera, and species, thereby eliminating this conflict within the Code.

ISSN:0040-0262    

DOI:10.2307/1218008

出版商:Wiley    

年代:2019

数据来源: WILEY

ISSN:0040-0262    

DOI:10.2307/1218009

出版商:Wiley    

年代:2019

数据来源: WILEY

ISSN:0040-0262    

DOI:10.2307/1218010

出版商:Wiley    

年代:2019

数据来源: WILEY