Perianth evolution in the early-divergent family Annonaceae

Main Theme: Contributions of Flora Malesiana to the Welfare of People in AsiaOral Presentation - Session 1: Taxonoly & Biosystematic-1Despite the considerable taxonomic diversity of the Annonaceae, floral structure in the family is remarkably uniform in its underlying ‘Bauplan’: Annonaceae flowers are characterised by three perianth whorls (sepals, outer petals and inner petals), with three organs per whorl; and a floral vascular system in which the traces feeding the perianth organs are basally fused. The Annonaceae are of particular phylogenetic interest as they show several apomorphic characteristics, including a differentiated (dipartite) peri...postprin