The September cover shows Senna trees,one of the largest genera of the subfamily Caesalpinioideae (Leguminosae) with approximately 280 species, predominantly distributed in the American continent, while the remaining species are distributed in Australia, Africa, and Asia. Based on extensive fieldwork and collection-based research the authors de Lima et al. identified two new species which they describe as S. dryadica and S. franciscana from the Brazilian Atlantic Forest and Caatinga domains respectively. In addition, the authors recognize S. gloriosa as a morphologically and ecologically distinct species, rather than as a variety of S. splendida. The two new species are illustrated and described, and distributional and phenological data as well as a preliminary conservation assessment for each species is provided. Photo by: Alexandre Gibau de Lima.