This member of the Apocynaceae
given this name by Jonas M. Lüthy in 2005. It is found near Toliara
on Madagascar, growing in a well
drained soil with some water and lots of sun. The swollen stem
can grow to 35 centimetres or more in diameter, and reach a height of
metres. The large flowers are white with a yellow throat.
IPNI has Pachypodium as members of the Brassicaceae family.