This is a pretty and attractive palm-like plant with a thick, succulent thorny grey trunk but it is not a palm. Pachypodium are actually in the same family as Plumeria.
Description: Semidecidous or deciduous semitropical succulent stemmed tree, 2,5 m tall , or more with optimal conditions. (As a houseplant, they are much smaller) In cultivation it is often marketed as the "Madagascar Palm", despite in not being a palm at all. The Pachypodium tends to lose its leave and go dormant in winter in temperate climate areas.
Stem: It has an instensely spiny grey and very attractive and stout trunk, which is generally solitary or scarcely branched and the base is spindle-shaped. The stems can grow up to 30 centimetres in diameter and five meters height.
Thorn: 2 to 6 cm long.
Leaves: Simple green lanceloted arranged spirally mostly just at the top of the plant
Roots: Fine, delicate (older plants can have huge rootballs, though).
Flowers: The flowers are 5-8 cm in diameter, white with yellow centre, attractive and nice smelling.
Blooming season: Only mature plants bloom (1.8 m tall or more). It flowers in spring to early summer, on and off through all the warm months.
Fruits and seeds: It produces seed pods that look like cucumbers. Left alone, they eventually open along the seam revealing great numbers of white-winged seeds.