(This plant comes in a 3.5" 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).
Description: This is one of the larger headed species, solitary or clustering when the main head is about 5-7 cm in diameter and producing a patch over time. It distinguishes for the tubercles with chinned bases.
Flowers: Showy that cluster around the lower stem, funnel-shaped with short necks, about 3 cm tall, 3,5 cm in diameter, deep purple or magenta.
Blooming season: Spring.
Some of the information in this description has been found at desert-tropicals.com, llifle.com and cactus-art.biz