Securidaca aurea (Polygalaceae, Polygaleae), a new species from the Brazilian Amazon

During a review of the genus Securidaca (Polygalaceae) in all pantropical regions, a new Amazonian species was found and is described here as S. aurea. The new species is compared to S. revoluta, mainly for the absence of the crest on the keel and strongly revolute leaves. However, S. aurea is easily recognised by its much longer samaras and the golden indumentum covering its leaves and branches. The new species is illustrated by photographic plates and taxonomic notes, a preliminary conservation status and a geographic distribution map are provided.