
Mature plants are easily recognizable by their cephalium, a wool- and bristle-coated structure at the apex of the plant, containing a mass of areoles from which the small flowers grow. The red, wool-coated cephalium, said to resemble the Fez hat of Turkish male citizens during the late Ottoman Empire, gives the plant one of its common names, "Turk's cap cactus". It gives its name to the Turks Islands, part of the Turks and Caicos Islands.





