摘要:

SummaryLewis, J. A.: Transfer of the Australian red algaeKallymenia nitophylloidestoCryptonemia (Halymeniaceae)andHalymenia chondrkolatoHymenocladia (Rhodymeniaceae). – Taxon43: 3‐10. 1994. – ISSN 0040‐0262.Type material ofKallymenia nitophylloidesJ. Agardh from northern New South Wales was found to be taxonomically identical to plants collected recently at a number of sites further south in New South Wales and in Victoria. The new material has reproductive and vegetative features consistent with the genusCryptonemia (Halymeniaceae).The combinationCryptonemia nitophylloides(J. Agardh) J. A. Lewis is therefore proposed. The holotype ofHalymenia chondrkolaSond. from Western Australia was found to belong in the genusHymenocladia (Rhodymeniaceae).The species corresponds with that generally reported in southern Australia asHymenocladia polymorpha(Harv.) J. Agardh and in New Zealand asHymenocladia sanguínea(Harv.) Sparling. As the nameHalymenia chondricolapredates both of the Harvey basionyms, the binomialHymenocladia chondrkola(Sond.) J. A. Lewis is proposed. Lectotypes are designated forRhodymenia polymorphaHarv. and the related yet distinctCalliblepharis conspersaHarv.

ISSN:0040-0262    

DOI:10.2307/1223455

出版商:Wiley    

年代:2019

数据来源: WILEY

摘要:

SummaryBaum, D. A.&Oginuma, K.: A review of chromosome numbers inBombacaceaewith new counts forAdansonia.–Taxon43: 11‐20. 1994. – ISSN 0040‐0262.New chromosome counts are reported for all eight species ofAdansonia.The six Malagasy species and the Australian species have 2n= 88, whereas the single African species,A. digitata,has 2n= 160. We review published counts for the family as a whole and conclude that there have been many inaccurate counts but that 2n= 86‐92 appears to be general.A. digitata, Rhodognaphalon brevicuspeandEriotheca pubescensare inferred to be polyploids. The tribeDurioneae,with counts of 2n= 28 and 2n= 56, is distant from the remainder of the family, as also suggested by morphological, biogeographic and molecular data.

ISSN:0040-0262    

DOI:10.2307/1223456

出版商:Wiley    

年代:2019

数据来源: WILEY

摘要:

SummaryRieseberg, L. H.&Brouillet, L.: Are many plant species paraphyletic? –Taxon43: 21‐32. 1994. – ISSN 0040‐0262.The phylogenetic Status of plant species has become a critical issue in systematic and evolutionary botany, due in part to the influence of Hennigian principles on organismal classification. This paper reviews various modes of speciation and their frequency in plants, and discusses predicted phylogenetic consequences of different modes of speciation. The classic model of allopatric speciation by subdivision will typically generate monophyletic daughter species, whereas most geographically local models of speciation (e.g., the founder effect model), will produce a paraphyletic progenitor and monophyletic derivative species. Due to the theoretical difficulty of transforming widespread population systems through gene flow or selection, allopatric speciation by subdivision is likely to be less frequent than geographically local models of speciation. Low levels of gene flow will also increase the time required for the progenitor species to achieve monophyly. Thus, many plant species are likely to be paraphyletic, and predictably a species classification based on the criterion of monophyly is unlikely to be an effective tool for describing and ordering biological diversity.

ISSN:0040-0262    

DOI:10.2307/1223457

出版商:Wiley    

年代:2019

数据来源: WILEY

摘要:

SummaryRobinson, H.: Notes on the tribesEremothamneae, Gundelieae,andMoquinieae,with comparisons of their pollen. –Taxon43: 33‐44. 1994. – ISSN 0040‐0262.The new tribeMoquinieaeis established, and scanning electron micrographs of pollen are presented ofHoplophyllumof theEremothamneae, Gundeliaof theGundelieae,andPseudostifftiaof theMoquinieae.

ISSN:0040-0262    

DOI:10.2307/1223458

出版商:Wiley    

年代:2019

数据来源: WILEY

摘要:

SummaryNieto Feliner, G.: Growth‐form and taxonomy inArenariasect.Plinthine (Caryophyllaceae). – Taxon43: 45‐50. 1994. – ISSN 0040‐0262.A study of the growth‐forms inArenariasect.Plinthineis presented, describing and interpreting two different, systematically relevant, patterns that are defined by the position of the innovation buds. The first, apparently the more evolved one, probably constitutes a good synapomorphy for the 7 taxa exhibiting it: innovation buds arise on short, vegetative lateral shoots arising below the starting point of the season's growth of the fertile axis. In the second case innovation buds arise in leaf‐axils along the whole length of the season's growth of the flowering shoots, extending to well above the first nodes and up to the base of the inflorescence. Recognition of these two growth‐forms helps to solve the old problem of the correct taxonomic placement of the population from Mont Ventoux (S. France), which must be included inA. aggregatanotA. erinacea.

ISSN:0040-0262    

DOI:10.2307/1223459

出版商:Wiley    

年代:2019

数据来源: WILEY

摘要:

SummaryGreen, D. G.: Databasing diversity – a distributed, public‐domain approach. –Taxon43: 51‐62. 1994. – ISSN 0040‐0262.Distributed, public domain databases (DPDD) offer solutions to many of the problems that hinder compilation of information on biodiversity. Existing DPDD projects on Internet, especially in molecular biology, provide relevant paradigms. The software tools necessary for world‐wide retrieval of associated text and images are all freely available on Internet. Essential features of DPDDs include universal access, decentralized maintenance of component data sets, and the use of standard, tagged formats for entries. Desirable validation protocols include cross‐checks for consistency, use of quality control tags and tracing data lineage back to specimens. These issues highlight a need for new conventions on nomenclature and for registering field keys and other secondary taxonomic indexes.

ISSN:0040-0262    

DOI:10.2307/1223460

出版商:Wiley    

年代:2019

数据来源: WILEY

摘要:

SummaryPlitmann, U.: Assessing functional reproductive traits from herbarial material: the test case of pollen tubes in pistils ofPolemoniaceae. –Taxon43: 63‐69. 1994. – ISSN 0040‐0262.Herbarium material can be used for studying certain functional reproductive traits, such as the plant's breeding system. A method is proposed by which pollen tubes can be traced in the pistil even in old dry specimens. By applying this method to species of thePolemoniaceae,microgametophytes could be scored in stigmas and styles and their mean numbers related to the specific known or putative breeding systems. Mean numbers of pollen tubes showed high correlation with the pollen‐ovule ratios or the stigmatic pollen germination of the species involved. These numbers were significantly higher in predominant inbreeders than in predominant or facultative out‐breeders. The method is thus suited for obtaining accessory biosystematic information from herbarial material.

ISSN:0040-0262    

DOI:10.2307/1223461

出版商:Wiley    

年代:2019

数据来源: WILEY

摘要:

SummaryTraverse, A.&Strother, P. K.: On the current nomenclatural status ofTetrahedraletes(Fossiles). –Taxon43: 71‐74. 1994. – ISSN 0040‐0262.Two valid and legitimate generic names of Silurian fossil obligate tetrads,TetrahedraletesandNodospora,published by Strother&Traverse, are based on type specimens that now are recognized as representing a single genus. Burgess, the first to propose the synonymy formally, selectedTetrahedraletesas the generic name for the combined genus, and his choice, having priority, must be followed. Gray's call to abandon both generic names is misguided.

ISSN:0040-0262    

DOI:10.2307/1223462

出版商:Wiley    

年代:2019

数据来源: WILEY

摘要:

SummaryGerbaulet, M.: Lectotypification ofPhyllobolusN. E. Br.(Aizoaceaes. str.). –Taxon43: 75‐76. 1994. – ISSN 0040‐0262.The generic namePhyllobolusN. E. Br. was untypified since the name of the species given as type,P. pearsoniiN. E. Br., was not validly published. The problem is discussed in the light of unpublished Brown manuscripts on the genus, andP. resurgens(Kensit) Schwantes, here lectotypified, is designated as type.

ISSN:0040-0262    

DOI:10.2307/1223463

出版商:Wiley    

年代:2019

数据来源: WILEY

摘要:

SummaryMarhold, K.&Rayner, T. G. J.: Typification of the names of two species of theCardamine pratensisgroup(Brassicaceae). – Taxon43: 77‐83. 1994. – ISSN 0040‐0262.Cardamine rivularisSchur is lectotypified by a specimen at Vienna (W) collected by Schur in Romania.C. matthioliMoretti is lectotypified (or neotypified) by a specimen at Florence (FI) collected by Moretti in Lombardy. The confusion concerning the latter's author and place of publication is resolved: bibliographical details and chronology of 5 publications in which the name appears, all of 1847, are discussed, showing that it was validly published on 18 Aug 1847 by Moretti.

ISSN:0040-0262    

DOI:10.2307/1223464

出版商:Wiley    

年代:2019

数据来源: WILEY