This is a Mexican hybrid of some sort we bought it as a no i.d but this plant would look awesome on a rock or it will definitely stick out in any collection as it does in ours I have no further information on it. We call it our sideshow Bob. Definitely a cool plant.  Mama in the square pot is full size making it about 4inch spread
Many available the same size or larger as the one in the picture with the quarter 2 inch pots