(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).
Also known as Parodia turecekianus is native to South America. It th is a very nice purple globulose cactuse can grow up to 10 cm in diameter. It is easy to grow. It likes a warm bright location, does great in partial shade avoid full sun. It needs good drainage and prefers a neutral to slightly acidic compost with plenty of extra grit. Water and feed during the summer. Best if watered with rain water. Keep above 0°C and rather dry in winter, rot easily if the substrate is wet and cold, tends to lose its roots in winter.
Some of the information in this description has been found at desert-tropicals.com, llifle.com and cactus-art.biz