I'm certainly no expert on these, but since nobody else has weighed in, my starting guess would be Dyckia platyphylla or maybe brevifolia, or a hybrid with one of those in its parentage. There are lots of species and hybrids out there that I've not seen in person, but you can look through the pictures on the FCBS site. In my own collection I've got species, hybrids, and a bunch of unnamed F2 hybrids that I liked the look of, and you may only be able to narrow it down to likely parents. From what I've read, some dyckias are self fertile and some are not, and I've had both viable and non viable seed from my plants. http://fcbs.org/pictures/Dyckia.htm

Thanks for that link, Karen. Hadn't seen that before. Mine looks like brevifolia. Maybe no way to be absolutely sure?

Any ideas on this one?

Dyckia jonesiana maybe? Based on the small spines and the way it’s pupping.