Echinocereus russanthus weedinii
(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).
Usually single stemmed cacti that may branch and form clusters, some having as many as a dozen. In culture E. russanthus will grow without problems and regularly will produce its small but beautiful purplish flowers that will contrast with its natural yellowish color. Needs good drainage, Keep drier and cool in winter. Light is shade is good but will grow better in full sun; Very cold resistant hardy to -20° C or less for short periods of time.
Some of the information in this description has been found at desert-tropicals.com, llifle.com and cactus-art.biz