I'm not entirely positive, but I believe it's the 'Bishops Form' cultivar of E. x variabile. If that does not seem right to you [and you are vastly more knowledgeable than me on these things, I can try to track it down via the eBay seller I purchased it from.
By the way, thanks for sharing your photos. You have some incredible plantings shown there, and a great source of inspiration.
How did you manage that planting of sulfur tuft mushrooms? Did you lift them as a clump and then pot them?
Beautiful, both. Artful and natural-looking at the same time. Love the visual texture on the second one especially.
Thanks @shinmai and @Brian Van Fleet for the Erodium info - I'll be looking for that variety.