Phylogenetics of the New World Subtribes of Asclepiadeae (Apocynaceae—Asclepiadoideae): Metastelmatinae, Oxypetalinae, and Gonolobinae

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

“…The plastid phylogenetic framework presented for the neotropical Asclepiadoideae by Rapini et al (2003) and Liede-Schumann et al (2005) provided important evidence to support significant subtribal rearrangements. The Metastelmatinae became restricted to the New World, also including genera previously classified in the Marsdenieae, such as Barjonia Decaisne (1844: 512) and Nephradenia Decaisne (1844: 604); whereas most Old World species of the subtribe were transferred to the Cynanchinae (Liede & Täuber 2002, Rapini et al 2003.…”

“…Neotropical species of Asclepiadoideae are distributed in just four lineages, the largest including members of the Metastelmatinae, Oxypetalinae and Gonolobinae. Together, these three subtribes form the core group of a clade informally referred as the "MOG" clade (Rapini et al 2003, Liede-Schumann et al 2005.…”

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.…”

Apocynaceae do Parque Estadual de Ibitipoca, Minas Gerais, Brasil

“…No entanto algumas Tassadia podem apresentar corona dupla e inflorescências extra-axilares (Fontella-Pereira 1977), tornando nebuloso o limite entre os dois gêneros. Na sua circunscrição atual o gênero não é monofilético (Liede-Schumann et al 2005). Na tentativa de buscar táxons monofiléticos, Konno et al (2006) Subarbusto ramificado, 20-60 cm alt.…”