Pachypodium geayi 14"Pachypodium, or commonly referred to as "Madagascar Palm," is a stem succulent member of the Apocynaceae family and not a true palm. Upright grey green trunk that has large thorns and a cluster of green leaves at the top. Light: full sun Soil: succulent mix Watering: dry between watering Images are used for general reference only. The size, shape, leaf state and bloom state of each plant will vary.