Mammillaria pottsii is a small, solitary or clustering cactus. It has white radial spines and darker, often hooked central spines. Pink-purple flowers bloom in a ring,.
Above information is sourced from Wikipedia
© José G. Flores Ventura (CC-BY-NC)
© (c) Francisco Martínez González, some rights reserved (CC BY-SA)
© Carlos Velazco − EOL
© (c) Ricardo Jaimes-López, some rights reserved (CC BY)
© (c) Ian McFaul, some rights reserved (CC BY)