The study was based on morphological analysis of specimens from various national herbaria as well as collected material. The tribe is represented in the study area by eight genera: Actinostemon Sw. (3 spp.), Mabea Aubl. (1sp.), Maprounea Aubl. (1sp.), Microstachys A. Juss.(2), Sapium P. Browne (2 spp.), Sebastiania Spreng. (1 spp.), Senefeldera Mart. (1sp.) and Stillingia Garden ex L. (1sp.). Widely distributed genera are Sapium and Sebastiania occurring in all phytogeographical zones. Actinostemon, Senefeldera and Mabea are restricted to the Atlantic rainforest. Identification keys to genera and species, descriptions, illustrations and taxonomic comments are presented.
Euphorbiaceae; Hippomaneae; taxonomy; Pernambuco
