A Dudleya farinosa (!) about the size of my hand, washed up or delivered by dog. (The rosette's a few inches across.) Surely this is guilt-free wild plant collection. For you non-Californians, Dudleyas are echevaria-like succulents that grow on our coast (and inland, and in Mexico). Wikipedia has a nice photo of a healthy specimen. The plant I found, while lacking roots, is still firm and should be as easy to propagate as a sedum.
One may recall that big silver Dudleyas were on my fountain planting wishlist, but on second thought, I think it would get too much water there.
And in related news, the Triteleia bulbs have surprised me by putting out rapid growth: flower buds and one bloom. It's a little late for the 4th of July, but the color combination turned out to be red, silver (or white, if you will), and blue, instead of red, purple and silver. Some changes may be necessary for next year. Still, I can't complain.