<strong>Towards a stable generic circumscription in Oxypetalinae (Apocynaceae)</strong>

Abstract

Based on phylogenetic studies and morphological evidence, we propose the synonymization of Morrenia and Schistogyne under Araujia and Oxypetalum respectively. As a result, eight new combinations are proposed in Araujia (A. brachystephana, A. hassleriana, A. herzogii, A. odorata, A. scalae, A. stuckertiana, A. stuckertiana subsp. grandiflora and A. variegata)

The taxonomy and systematics of Apocynaceae: where we stand in 2012

“…Intrageneric relationships of New World Asclepiadeae have been assessed using plastid (Liede‐Schumann et al ., ) and internal transcribed spacer (ITS) markers (Rapini et al ., ) and most of the genera were found to be non‐monophyletic, prompting a great amount of generic realignment (e.g. Goyder, ; Rapini, Fontella‐Pereira & Goyder, in Oxypetalinae). Rapini () presented an account of the recent developments in the classification of Apocynaceae, with particular emphasis on Brazilian Asclepiadoideae.…”

Systematics ofPrestonia(Apocynaceae: Apocynoids: Echiteae) 80 Years After Woodson

“…Endress and Bruyns (2000) recognized five subfamilies: Rauvolfioideae and Apocynoideae from the traditional Apocynaceae, and Periplocoideae, Secamonoideae, and Asclepiadoideae from the traditional Asclepiadaceae. Since then a number of phylogenetic studies have contributed to the resolution of relationships at the tribal, subtribal, or generic level, which has led to the reorganization or description of tribes and subtribes and the synonymization of several genera (e.g., Meve & Liede, 2004;Simões et al, 2004Simões et al, , 2006Simões et al, , 2010Liede-Schumann et al, 2005;Rapini et al, 2006Rapini et al, , 2011Endress & Hansen, 2007;Endress et al, 2007aEndress et al, , 2007bLivshultz et al, 2007;Silva et al, 2012;Khanum et al, 2016;Meve et al, 2017;Morales et al, 2017). Despite these advances, many groups are still unresolved or the resolution is too low to accurately define their relationships.…”

Is the southern South American genus Tweedia (Apocynaceae: Asclepiadoideae) monophyletic? Molecular phylogenies, distribution and taxonomy

“…-Morphological information and geographical distribution of the genus and species were obtained from herbarium material and from recent treatments (Rua, 1989;Rua & Liede, 1994;Ezcurra, 1999b;Hechem & Ezcurra, 2006;Ezcurra & al., 2008;Hechem & al., 2012;Ezcurra & Hechem, in press). Generic limits of the genera to which Tweedia is related follow recircumscriptions recently accepted in Oxypetalinae (Goyder, 2004;Liede-Schumann & al., 2005;Rapini & al., 2006;Rapini & al., 2011).…”

“…During the 20th century, following Woodson (1941), the taxonomy of Asclepiadoideae has been simplified and many small and ill-defined genera have been reduced to synonymy of larger ones (see, e.g., Rapini, 2002;Goyder, 2003Goyder, , 2004Liede-Schumann & al., 2005;Goyder & al., 2007;Meve & Liede-Schumann, 2007), but many genera of southern South America still remain little studied and difficult to distinguish morphologically. Only recently, molecular phylogenies have provided additional information to support their monophyly and help establish their limits and relationships (e.g., Liede-Schumann & al., 2005;Hechem & al., 2011;Rapini & al., 2011;Liede-Schumann & Meve, 2013).…”