A stunning, large, dry deciduous tree to 30 m (100 ft.) tall, with a thick, purplish-gray, bottle-shaped trunk to 10 m (33 ft.) in diameter. The attractive, large orange flowers open at night. It is native to thorn forest and savannas in southern and western Madagascar. In cultivation it does best in the dry tropics in USDA Zone 10 or above. Soak seeds in water for a day before sowing in a well draining substrate.