Botanical name: Mammillaria baumii Family: Cactaceae (Cactus family)
Synonyms: Mammillaria radiaissima
Baum's Nipple Cactus grows in large mounds. The individual stems are shaped spherical to ovoid and are almost completely obscured by the spines. They are 5-7 inches high and 5-6 inches tall in diameter. The warts are shiny green, soft fleshy, cylindrical to conical and without latex. The 5 to 11 central spines are slender and straight. They have a length from 1 to 1.8 cm and are whitish yellow. The extremely thin 30 to 50 radial spines are flexible interlocking, white and have a length of 1.5 cm. Flowers are 2.5-3 inches across. They are of a bright yellow color and are slightly fragrant. The oblong to obovate fruits are gray-green. They contain brown, pitted seeds. Baum's Nipple Cactus is native to Mexico, cultivated widely.
Identification credit: S. Kasim
The flower labeled Baum's Nipple Cactus is ...