Pachypodium is a genus of caudiciform succulents placed in the Apocynaceae family. Many of the species produce spectacular flowers. They exhibit a wide range of bizarre growth forms, from bottle-, cigar- or candelabrum-shaped trees to dwarf plants with very short stalks. Sizes range from a few centimetres above the soil to heights of more than 8 m. In southern Africa, the mystical elephant’s trunk or halfmens (Pachypodium namaquanum) is probably the best known and rarest member of the genus. Pachypodiums are characteristically plants of hotter, drier regions of southern Africa and Madagascar where they reach maximum diversity in terms of numbers of species. Most species grow well in pots and rockeries. Larger species like Pachypodium geayi and Pachypodium lamerei make excellent landscaping plants too.

Pachypodium baronii, the Madagascar palm or bontaka, is a flowering plant. It has the habit of a robust shrub with a spherical or bottle-shaped trunk. It has several cylindrical branches at the top. This plant is endemic to Madagascar, where it grows in open deciduous forest on Mesozoic calcareous rock and granite or gneiss on the western side of the island at low elevations. It is known in Madagascar as “Bontaka”. It is also endemic from Befandriana Nord to Mandritsara. Constantin and Bois first described Pachypodium baronii as a species of the genus Pachypodium in 1907.