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The Mammillaria theresae, Cutak 1967, is included by Jonas Lüthy (1995) in the Longiflorae series, and takes its name from its discoverer, Theresa Bock; one of the few cactus with own name of woman Theresae, because Bock already existed as Mammillaria bockii. Their flowers are of prettiest of the Mammillaria sort, seemed to those of Mammillaria saboae. In fact, Rowley considered it like a variety of Mammillaria saboae, although it difference by its feathery spines that give a beautiful appearance to the plant.
Mammillaria theresae comes from the center of the state of Durango, Mexico, with only one know population of these plants, that grow on rocks between 2,150 and 2,300 ms of altitude. Some of them have disappeared by harvesting by collectors, and others by the construction of a way to Coneto. In spite of it, it continues being abundant in his habitat.
Mammillaria theresae has sub globular stems or cylindrical, normally solitary in wild state, she is more prone to form bushes in culture. The stems reach 4cm of height and 2,5de diameter, with salient tubercles in the inferior portion; their roots are heavy, fusiform. The tubercles are arranged in 5 and 8 spiraled series, of green color olive, some times with dyes purple. The mammillas reach 6mm of height and 3mm of width in the base. The armpits display appreciable wool hardly. His areolas, circular or elliptical, from 22 to 30 radial of color white, short, translucent and feathery spines, of 2mm of length. By Vicente Bueno, Illustrious Dr. Good de Cactus Center Club |
