Summary
This paper is a study of the leaf anatomy of three species of Humiriaceae: Endopleura uchi (Martius) Cuatr., Humiria balsamifera St. Hill. var. floribunda (Martius) Cuatr. e Humiriastrum cuspidatum Benth. A survey of four areas of the leaf blade for each species was made: apex, margin, center and base. The midrib, middle, apical and basal regions were studied.