From Arizona, New Mexico, Texas and northern Mexico, Echinomastus intertextus is a solitary globular to columnar cacti to 6 inches tall and 4 inches across. White flowers sometimes tinged with purple are produced in early spring.
I got this in a trade with a guy in El Paso. He sent me 4 of them but only 1 made it. I'm being very carefull with the remaining one, they are prone to rot.