Looks like a "sedum", a succulent ground cover I'm not sure which kind (maybe Sedum acre} but there are too many different sedums to be sure from a distance. There should be someone in a groundcover nursery who could identify it specifically for you.
If it is, it also make a good green roofing material. Some folks even use it in salads.
So I tried, and I like the salty taste and the texture.
Even a better salad than portulaca oleracea...
Full sun and you can even make a 10' curtain from your window!
I have planned to put some on my stone balcony and cover the wall.
Can stand 30°F and you can keep bits of stem over winter in case of frost, to start it again.
Xisca - pics! Dry subtropical Mediterranean - My project However loud I tell it, this is never a truth, only my experience...
Get me the mayor's office! I need to tell him about this tiny ad: