New record and emended description of a rare white-sand Amazonian species: Schoepfia clarkii (Schoepfiaceae)

New records for Schoepfia clarkii collected from the lower Negro River basin in Brazil.

Tree species composition in ecotone forests on Maracá Island, Roraima, northern Brazilian Amazonia: preliminary data

Forest inventory carried out in the research grid of the Research Program on Biodiversity (PPBio) located in the eastern Maracá Island, Roraima, northern Brazilian Amazonia.

A new species of Macrolobium (Fabaceae, Detarioideae) endemic on a Tepui of the Guyana shield in Brazil

Macrolobium aracaense (Fabaceae), a new endemic treelet species from Brazil, is here described and illustrated.

Tree species composition in different habitats of savanna used by indigenous in the Northern Brazilian Amazonia

Tree inventory in four different habitats occurring in indigenous savanna areas of the Northern Brazilian Amazonia.