These little guys were found with a group thrown by the side of the road on the highway near Sedona, Arizona. I brought them back to Las Vegas 7 years ago and planted them. At that time, they were the size of a silver dollar. Today, the original 2 are approximately 6 inches in diameter with four smaller ones growing. Please help me identify these cacti. Thank you for your time!
Is this Echinopsis? If so, which one?