Question for the Hive Mind: NOID outdoor plant

Although a lot of them got trampled when the new windows were put in for the plant room (Pictures of the plant room are still pending. The plants and I plan to retake some of the territory in the East Living Room region, which will depend on repelling the forces of Paint and Painting Accessories. Meanwhile, the refugees continue to occupy all available surfaces in the plant room.), the previous owners of our house apparently planted a bunch of these things with yellow flowers. Before they flowered, I thought I knew what they were (though I don't remember what my theory was), but now I'm thinking Sedum of some kind? Maybe?


At the very least, the flowers look remarkably like the flowers of the Sedum 'Lemon Coral' I posted about in May: also yellow, also five-petaled, with five long anthers (they are anthers, right? Never let it be said that I claim to have all the anthers.) situated between petals. I mean, the similarities are definitely there, though the rest of the plants don't look particularly alike.


I know you can't really see the leaves and habit all that well in these pictures, but if anybody has any more specific theories about IDs, I'd welcome hearing them. I don't know if I need twenty square feet of them, but they're interesting plants, and it'd be nice to be more certain about what they are before I start making decisions about how many I want and where I want them.