A new species of Protium (Burseraceae) from the Pacific Coast of Costa Rica

Protium santamariae is described and illustrated.

Notes on morphology and distribution of Acmanthera (Adr. Juss.) Griseb. (Malpighiaceae), an endemic genus from Brazil

Amended description of the species Acmanthera minima and A. parviflora; a key to all species of the genus Acmanthera; new records and range extension for Acmanthera latifolia and A. minima.

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.