Banksia sect. Eubanksia is an obsolete section of Banksia. There have been two circumscriptions, one of which is synonymous with the recently abandoned B. subg. BanksiasensuAlex George, the other having no modern equivalent.
George Bentham published a new arrangement of Banksia in 1870, dividing Banksia into five sections. He appropriated B. sect. Eubanksia for a section containing only B. marginata (Silver Banksia), B. dentata (Tropical Banksia) and B. integrifolia (Coast Banksia), claiming that "the three species here included... are so closely allied and so frequently connected by intermediates, that they might almost be considered as varieties of a single one." Thus Bentham's circumscription was completely unrelated to that of Brown, Endlicher and Meissner.[5]
B. sect. Eubanksia fell into disuse in 1981, when Alex George published his arrangement in The genus Banksia L.f. (Proteaceae). He reverted to the circumscription of Brown, Endlicher and Meissner, but by this time the rules of botanical nomenclature had been formalised in such a way that Brown's Banksia verae had to be given the autonymB. subg. Banksia; thus Endlicher's unranked Eubanksia and Meissner's section Eubanksia are now considered nomenclatural synonyms of B. subg. Banksiasensu George.[6] This circumscription was retained in Thiele and Ladiges' 1996 arrangement,[7] and in George's 1999 arrangement,[8] but was finally abandoned in 2007 with the publication of B. subg. Banksia sensu Austin Mast and Kevin Thiele.[9]
On the other hand, Bentham's circumscription of B. sect. Eubanksia has no modern equivalent. The three species placed in that section by Bentham were all placed by George in B. ser. Salicinae,[6][8] and retained in that series under Thiele and Ladiges' 1996 arrangement.[7] In both arrangements, however, the series contains a number of other species, and Bentham's three species are not considered particularly closely related.
Referencesedit
Wikisource has original text related to this article:
banksia, sect, eubanksia, obsolete, section, banksia, there, have, been, circumscriptions, which, synonymous, with, recently, abandoned, subg, banksia, sensu, alex, george, other, having, modern, equivalent, integrifolia, coast, banksia, three, species, george. Banksia sect Eubanksia is an obsolete section of Banksia There have been two circumscriptions one of which is synonymous with the recently abandoned B subg Banksia sensu Alex George the other having no modern equivalent B integrifolia Coast Banksia one of the three species in George Bentham s circumscription of B sect BanksiaThe name Eubanksia was first published without rank by Stephan Endlicher in 1847 1 He published it as a replacement name for Robert Brown s Banksia verae the true banksias In Brown s taxonomic arrangement of Banksia Banksia verae was defined as comprising all species with a typical Banksia flower spike and thus contained all known species except B ilicifolia Holly leaved Banksia which was unusual in having domed flower heads 2 3 Brown s circumscription of Banksia verae was retained for Eubanksia by Endlicher and again by Carl Meissner who gave Eubanksia sectional rank in his 1856 arrangement Meissner divided B sect Eubanksia into four series on the basis of leaf characters B ser Abietinae B ser Salicinae B ser Quercinae and B ser Dryandroideae 4 George Bentham published a new arrangement of Banksia in 1870 dividing Banksia into five sections He appropriated B sect Eubanksia for a section containing only B marginata Silver Banksia B dentata Tropical Banksia and B integrifolia Coast Banksia claiming that the three species here included are so closely allied and so frequently connected by intermediates that they might almost be considered as varieties of a single one Thus Bentham s circumscription was completely unrelated to that of Brown Endlicher and Meissner 5 B sect Eubanksia fell into disuse in 1981 when Alex George published his arrangement in The genus Banksia L f Proteaceae He reverted to the circumscription of Brown Endlicher and Meissner but by this time the rules of botanical nomenclature had been formalised in such a way that Brown s Banksia verae had to be given the autonym B subg Banksia thus Endlicher s unranked Eubanksia and Meissner s section Eubanksia are now considered nomenclatural synonyms of B subg Banksia sensu George 6 This circumscription was retained in Thiele and Ladiges 1996 arrangement 7 and in George s 1999 arrangement 8 but was finally abandoned in 2007 with the publication of B subg Banksia sensu Austin Mast and Kevin Thiele 9 On the other hand Bentham s circumscription of B sect Eubanksia has no modern equivalent The three species placed in that section by Bentham were all placed by George in B ser Salicinae 6 8 and retained in that series under Thiele and Ladiges 1996 arrangement 7 In both arrangements however the series contains a number of other species and Bentham s three species are not considered particularly closely related References edit nbsp Wikisource has original text related to this article Flora Australiensis Volume V CIV Proteaceae 28 Banksia Eubanksia Endlicher Stephan 1847 Genera Plantarum Secundum Ordines Naturales Disposita Supplement 4 pp 88 Brown Robert 1810 Prodromus Florae Novae Hollandiae et Insulae Van Diemen London Taylor Brown Robert 1830 Supplementum Primum Prodromi Florae Novae Hollandiae London Taylor Meissner Carl 1856 Proteaceae In de Candolle A P ed Prodromus systematis naturalis regni vegetabilis Vol 14 Paris Sumptibus Sociorum Treuttel et Wurtz Bentham George 1870 Banksia Flora Australiensis Vol 5 Myoporineae to Proteaceae London L Reeve amp Co pp 541 562 a b George Alex S 1981 The Genus Banksia L f Proteaceae Nuytsia 3 3 239 473 a b Thiele Kevin Ladiges Pauline Y 1996 A Cladistic Analysis of Banksia Proteaceae Australian Systematic Botany 9 5 661 733 doi 10 1071 SB9960661 a b George A S 1999 Banksia In Wilson Annette ed Flora of Australia Vol 17B Proteaceae 3 Hakea to Dryandra Collingwood Victoria CSIRO Publishing Australian Biological Resources Study pp 175 251 ISBN 0 643 06454 0 Mast Austin R and Kevin Thiele 2007 The transfer of Dryandra R Br to Banksia L f Proteaceae Australian Systematic Botany 20 63 71 doi 10 1071 SB06016 Retrieved from https en wikipedia org w index php title Banksia sect Eubanksia amp oldid 1101594095, wikipedia, wiki, book, books, library,
