The little plant shown here is a sedum native to the west coast of North America. You will usually find it offered as Sedum spathulifolium 'Cape Blanco', but a Google search also turned up S. spathulifolium ssp. pruinosum 'Cape Blanco' and Gormania spathulifolia. Although sedums as a group are among the easiest plants to grow successfully in local gardens, this one is an exception. I've acquired it more than once over the years, and each time I soon lost it. I've mentioned this to other more experienced local growers, and their experience has been the same. It wasn't until I began to learn how to grow the bulbs from the west coast that I got a clue to what this sedum needs. What it apparently needs is a dryish summer and, probably, a bit of winter protection.
The one shown in the image above was acquired in May of this year. I kept it under the eaves (and thus in the rain shadow of the roof overhang) but in bright light for the summer. It's going to spend the winter in one of the cold frames.