A taxonomic study of Sedum series Rupestria (Crassulaceae) naturalized in North America
Physeterostemon gomesii (Melastomataceae): the fourth species of this endemic genus in Bahia, Brazil
Psilochilus dressleri (Orchidaceae), a new species from the Darién Gap, Panama
Bredemeyera divaricata, a new combination for the well-known Amazonian species of Polygalaceae