The morphological and anatomical aspects of flower and fruit and the essential oil analysis of fruits of Hennecartia omphalandra J. Poisson (Monimiaceae), a toxic plant, are described in this paper. The presence of vascular recurrent bundles and of a ring of brachysclereids in the hypanthium; the oil cells in the mesocarp, the "idiosclereids" that constitutes the endocarp and cells with reticulated thick walls, shaping the seed coat were described as characters that may help in its diagnosis. The analysis of the essential oil of fruits showed the presence of monoterpenes, as well as sesquiterpenes hydrocarbons and alcohols, being the latter the most significant group. The major identified compounds were bicyclogermacrene (19.6%); β-felandrene (8.7%); germacrene D (5.3%); α - bulnesene (5.1%) and valerianol (4.9%).
Hennecartia omphalandra; Monimiaceae; toxic plants; multiple fruit; fruit anatomy; essential oil
