Beehive Cactus

This is cactus is likely the native Corphyantha robusta, but without flowers it is hard to be certain. They are long lived plants that form colonies and have exquisite flowers in shades of purple or magenta in the spring.
Regarding collecting them from the wild there a number of things to consider. First, it is illegal to collect live plants on federal land. Second, never collect a live plant with the landowner’s permission. Third, be certain that the plant does not have either federal or state protection. Every state has a list of such plants, and so do federal agencies. Fourth, it is always much better to collect seed than a live plant. These plant are very old when they are this large, and you will be removing what amounts to a population and a significant seed and food resource. And, cacti grow easily from seed. We would urge you to never consider collection from the wild but either take seed and grow them yourself or find a reputable dealer who grows these plants.