Systematics of psilocaulon N.E.BR. (Aizoaceae)

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dc.contributor.advisorLinder, H Pen_ZA
dc.contributor.authorKlak, Corneliaen_ZA
dc.date.accessioned2016-02-24T11:20:23Z
dc.date.available2016-02-24T11:20:23Z
dc.date.issued1997en_ZA
dc.descriptionBibliography: p. 131-140.en_ZA
dc.description.abstractOn the basis of herbarium, living and pickled material the morphology and systematics of Psilocaulon N. E. Brown sensu Ihlenfeldt & Bittrich is investigated. Thirteen species (including one insufficiently known species) are recognized: P. articulatum, P. bicorne, P. coriarium, P. dimorphum, P. dinteri, P. foliosum, P. gessertianum, P. granulicaule, P. junceum, P. leptarthron, P. parviflorum, P. salicornioides, P. subnodosum. Species of Mesembryanthemum, Prenia, Brownanthus, Aspazom and Aptenia are used as outgroups in a cladistic analysis of Psilocaulon. The monophyly of Psilocaulon is demonstrated. As a result P. rapaceum Jacq. is excluded and transferred to Caulipsolon Klak gen. nov. The position of Psilocaulon and the monotypic genus Caulipsolon within the subfamily Mesembryanthemoideae is discussed. However, relationships of Psilocaulon and Caulipsolon to other genera remain obscure, since no synapomorphies were found to indicate sister relationships. More sampling among outgroups and/or a future molecular study may help to elucidate relationships among the genera of the Mesembryanthemoideae. Geographical distribution patterns for all species and the number of species per half-degree grid square are given. It is discussed how species diversity and geographical distribution in Psilocaulon contrasts with or corroborates existing ideas of centres of diversity and distribution patterns in the Mesembryanthema. Each species is described in detail. A description of the genera Psilocaulon and Caulipsolon is given and a key to the species is provided. Material examined is cited and full synonomy is given.en_ZA
dc.identifier.apacitationKlak, C. (1997). <i>Systematics of psilocaulon N.E.BR. (Aizoaceae)</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Biological Sciences. Retrieved from http://hdl.handle.net/11427/17246en_ZA
dc.identifier.chicagocitationKlak, Cornelia. <i>"Systematics of psilocaulon N.E.BR. (Aizoaceae)."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 1997. http://hdl.handle.net/11427/17246en_ZA
dc.identifier.citationKlak, C. 1997. Systematics of psilocaulon N.E.BR. (Aizoaceae). University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Klak, Cornelia AB - On the basis of herbarium, living and pickled material the morphology and systematics of Psilocaulon N. E. Brown sensu Ihlenfeldt & Bittrich is investigated. Thirteen species (including one insufficiently known species) are recognized: P. articulatum, P. bicorne, P. coriarium, P. dimorphum, P. dinteri, P. foliosum, P. gessertianum, P. granulicaule, P. junceum, P. leptarthron, P. parviflorum, P. salicornioides, P. subnodosum. Species of Mesembryanthemum, Prenia, Brownanthus, Aspazom and Aptenia are used as outgroups in a cladistic analysis of Psilocaulon. The monophyly of Psilocaulon is demonstrated. As a result P. rapaceum Jacq. is excluded and transferred to Caulipsolon Klak gen. nov. The position of Psilocaulon and the monotypic genus Caulipsolon within the subfamily Mesembryanthemoideae is discussed. However, relationships of Psilocaulon and Caulipsolon to other genera remain obscure, since no synapomorphies were found to indicate sister relationships. More sampling among outgroups and/or a future molecular study may help to elucidate relationships among the genera of the Mesembryanthemoideae. Geographical distribution patterns for all species and the number of species per half-degree grid square are given. It is discussed how species diversity and geographical distribution in Psilocaulon contrasts with or corroborates existing ideas of centres of diversity and distribution patterns in the Mesembryanthema. Each species is described in detail. A description of the genera Psilocaulon and Caulipsolon is given and a key to the species is provided. Material examined is cited and full synonomy is given. DA - 1997 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1997 T1 - Systematics of psilocaulon N.E.BR. (Aizoaceae) TI - Systematics of psilocaulon N.E.BR. (Aizoaceae) UR - http://hdl.handle.net/11427/17246 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/17246
dc.identifier.vancouvercitationKlak C. Systematics of psilocaulon N.E.BR. (Aizoaceae). [Thesis]. University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 1997 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/17246en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Biological Sciencesen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherBotanyen_ZA
dc.titleSystematics of psilocaulon N.E.BR. (Aizoaceae)en_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMScen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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