The most easily recognized pachypodium is probably pachypodium lamerii or p. geayi the so-called Madagascar palm; this is not that pachypodium! Madagascar palms are from Madagascar; this pachypodium is from South Africa, but has the necessary fat body pachypodiums are know for. These plants grow more like a bush and so far, at least, mine is not as big or tall as the palms and has bloomed fairly regularly, which the palms so far have not.
Pachypodiums are caudiciforms, a category commonly known as fat plants, because they do have a fat body where they store water. The body is technically a stem, but I have seen it referred to as a fat trunk, and that is what it looks like. I didn’t take a picture of this one’s fat trunk because I really couldn’t get a good shot of it. But I have another one, p. baronii, that is on the verge of blooming, and its caudex-the fat body-is easier to see. So stay tuned.
But for now, enjoy this flowers on this one.