Pachypodium horombense

Pachypodium horombense is a species of Pachypodium endemic to Madagascar. The plant trunk is pachycaul, and typically short and fat. It produces large, campanulate, yellow flowers.

Synonymy
The species was formally known as: It is now considered a species in section Densiflora as the floral morphology is significantly different from related species.
 * Pachypodium rosulatum var. horombense