Mammillaria lauii subducta.
(This plant comes in a 3.5 inch pot. You will receive a very similar plant to the one in the picture. It may or may not be blooming at the time of your purchase. The plant is shipped in its pot to prevent any damage to the roots).
Mammillaria laui subs. subducta
Mammillaria laui subs. subducta is a low growing cactus that can gow up to 6 cm tall and 4,5 cm in diameter. usually forming big clusters or cushions, densely covered with bristly spines.
Flowers: Pink or carmine, to 15 mm long and 12 mm in diameter.
Blooming season: Spring.
Cultivation and Propagation: Mammillaria laui subsp. subducta is an easy to grow species, just as a classic cactus, don't requires any special treatment, but need as much light as possible without burning the plant to encourage the heaviest spine formation. It is a great plant for the cactus grower, that readily builds up into a cluster of stems
Growth rate: It is a relatively rapid growing species. This is easily grown into clumps, but it does often have an irregular pattern of offsetting. Most plants will offset readily, and clumps can be produced in a few years.
Watering: Water regularly in summer, Keep dry with ample airflow in winter.
Hardiness: It is quite frost resistant if kept dry, hardy as low as -5° C (some reports give it hardy to -12°C
Uses: It is an excellent plant for container growing. It always looks good and stays small. It look fine in a cold greenhouse and frame.
Some of the information in this description has been found at desert-tropicals.com, llifle.com and cactus-art.biz