Two new species of Apocynaceae, Asclepiadoideae from Mayotte

Abstract

Two new species endemic to Mayotte are described and illustrated : Marsdenia mayottae W.D. Stevens, Labat & Barthelat and Tylophora mayottae W.D. Stevens, Labat & Barthelat (Apocynaceae, Asclepiadoideae). Marsdenia mayottae is similar to Marsdenia vohiborensis Choux from Madagascar but differs by its very small or sometimes absent corona. Tylophora mayottae is morphologically close to Tylophora coriacea Marais but differs by its much smaller flowers. These two new species, discovered in during recent inventories, are assessed as threaten following the Categories and the Criteria of the IUCN Red List.

Marsdenia yarlungzangboensis (Apocynaceae, Asclepiadoideae), a new species from Xizang, China

“…However, these taxonomic treatments are not fully supported by the current molecular phylogenies (Endress et al 2014). Some new taxa of this genus have been discovered and described in recent years (Stevens and Juárez-Jaimes 1999, Juárez-Jaimes and Alvarado-Cárdenas 2010, Rapini and Pereira 2011, Fernando and Rodda 2013, Jaimes 2015, Jaimes and Pérez 2015, Jaimes and Saynes 2015, Carnevali et al 2016, Stevens et al 2016, Santo et al 2018a, 2018b. According to the treatment of Marsdenia in Flora of China, there are 25 species recognized in China and mainly distributed in the east, south and southwest provinces (Tsiang andLi 1977, Li et al 1995).…”