Opuntia rufida

Opuntia rufida is a species of prickly pear cactus native to southwestern Texas and northern Mexico, where it grows on rocky slopes. The species makes up for its total lack of spines with a profusion of red-brown glochids. The common name blind prickly pear or cow blinder comes from the fact that the glochids may be carried away by the wind and blind animals. The plant is closely related to Opuntia microdasys, and is sometimes taken as its subspecies, O. m. subsp. rufida. A commonly sold cultivar is Opuntia Rufida Minima Monstrose...read more on Wikipedia.