Parodia mammulosa is a species of succulent plant in the family Cactaceae. It is distributed throughout South America. This cactus grows on rocky outcrops, in grasslands or pampas, monte desert and high altitude grasslands.
Parodia mammulosa is a perennial globose plant with flattened apex and a dark green surface, reaching a diameter of about 15 cm. The species shows about 18 vertical ribs with large pointed tubercles. The radial spines are about 12, needle-like, up to 1 cm long, while the single central spine reaches 2 cm. The flowers bloom in spring and usually they are pale yellow, with a diameter of about 5 cm. It is among the the most wide-spread of the Parodia species and is very variable in appearance. The great variability of Parodia mammulosa is due to the fact that cross pollination among different forms and different species (in habitat and especially in collections) is very frequent. Plants may differs considerably about the form and arrangement of the spines, stems, ribs and flowers colour.