The Mammillaria theresae (Cristata) is a unique and beautiful succulent native to the state of Tamaulipas in Mexico. It is a small, slow-growing cactus that typically reaches only 6 inches in height and width. Its shape is quite distinctive; it forms a dense mound of densely packed stems that twist and curl around each other, giving it an almost braided appearance. The stems are light green with white spines, and can be up to 1 inch long. The flowers of the Mammillaria theresae (Cristata) are small but stunningly beautiful, ranging from pink to yellow in color with a red center. They bloom from late spring to early summer, making this succulent an excellent choice for adding some extra color to your garden during those months. The leaves of this plant are short and narrow, with a greyish-green hue. They are covered in tiny hairs which give them a soft texture when touched. When it comes to care requirements, the Mammillaria theresae (Cristata) is fairly easy to maintain as long as you provide it with plenty of sunlight and well-draining soil. It prefers temperatures between 65°F and 75°F, so if you live in an area with colder winters make sure you bring your plant indoors or provide adequate protection for it during those months. Additionally, make sure not to overwater your plant; too much water can cause root rot which will kill your succulent quickly! This species has been around since at least 1891 when it was first described by botanist Salm Dyck; however its exact origin remains unknown. Regardless of its mysterious beginnings, one thing is certain: this unique little cactus makes an excellent addition to any garden or home!