Pachypodium rosulatum eburneum
This subspecies occurs in Central Madagascar.
The deciduos leaves are a medium green with a light middle vein and symetrical veination. The trunk is a smooth silver with a light green tint. Conical spines occur in pairs and form a stair step pattern around the trunk. This species flowers have an ivory colored petal with a yellow tint in the center throat and are set on long peduncles with a half dozen or more flowers. Flowers will set in the second year in good conditions. Eburneum should be given full light and plenty of water during the warmer months and considerably less water in the cool months. Do not let this specimen sit damp in cool weather. It is definitely tender and should not be exposed to frost. Seedlings grow fairly slowly and mature sizes are fairly compact.