Most are densely spined, and in many types the spines are so elongated and soft that the plant appears hairy. Mature specimens develop into a low mound of long, snaking stems. The body of this small clumping cactus is cloaked in dense white spines, which are often pink-tipped. It produces rings of flowers in spring, that begin cream colored, then turn pink. The flowers are small and white or yellow.
Spherical cactus is greenish white, with felted pink spines.
Mature plants are covered with golden spines and dense white wool on new growth. Small, yellow flowers appear in spring and summer. These upright cacti grow up to 3 to 6 feet indoors. They are a smooth blue-green with brown spines. The flowers are white with outer petals tipped various colors and open at night.