The short, conical to truncate stem merges with the thick turnip-shaped root forming a woody caudex 5-15 cm tall and 6-7 cm in diameter (or more). It is an underground water-storage organ so it is very resistant to drought. In cultivation the tuberous rootstock is raised over the ground so that it can be seen and is especially cultivated for its looks. Architecturally it is a real stunner.