Dioecious or hermaphrodite trees, rarely shrubs, with clear to milky or red exudate. Leaves evergreen or deciduous, alternate to subopposite, simple, petiolate, entire. Inflorescences terminal and/or axillary panicles. Flowers articulate; perianth 5-parted, imbricate; corolla white, yellow, or green; stamens 5(–4); anthers dorsifixed; pistillode rudimentary; staminodes reduced; disk glabrous, cup-shaped, crenulate; ovary glabrous; carpels 3; styles 3, short, basally connate, apical to lateral; stigmas capitate; ovule lateral. Drupe widely depressed, ovoid or sigmoid, with persistent calyx; exocarp with longitudinal striations; endocarp chartaceous.
One to three species endemic to Madagascar. This genus is often treated as a sub-generic taxon of Searsia (Rhus s.l.) but molecular phylogenetic data (Pell et al. 2008) shows that the three species (B. taratana, B. perrieri, and B. thouarsii) are far removed from Searsia (and Rhus s.s.) and indicates that two of the species (B. perrieri and B. thouarsii), recognized by some in Protorhus, should perhaps be placed in a new segregate genus.
Original Publication: Baronia Baker, J. Bot. 20: 67 (1882).
Synonym: Rhus sect. Baronia (Baker) H. Perrier (1944).
Tropicos – Baronia