This page is a landing page for Pachypodium Genus, from here you’ll be able to traverse to all the species of this genus. I’ll try to add information for all of these species or at least link to sites with more data.
A little on classification below:
Below you will find the different species for the Pachypodium Genus. Sometimes though when you look at Pachypodiums though you’ll see things like var (variety) or f (forma). A variety is a subspecies. A forma is a classification even beyond that subspecies.