The stems on the black lace cactus are 1 to 6 inches long and 1 to 2 inches wide. The plant is coveted for its pink and purple flowers, which appear from April to June. The blooms are 2 to 3 inches wide.
The spines on each stem form a pattern that resembles lace or teeth in a comb. The spines are white with dark purple tips. The reproduction of the black lace cactus is aided by insects that transport pollen between plants. After being pollinated, the cactus develops small fruits with seeds that eventually fall to the ground, leading to the growth of new black lace cacti.
The black lace cactus likes wet, sandy soil. The plant grows alone or in small groups. The black lace cactus is endangered because of the loss of habitat due to land being cleared for cattle grazing and farming.
The Mesquite Brushland Preserve is one of the sites where you can still find the endangered cactus. The preserve covers 683 acres and opens occasionally for volunteer work projects and field trips.