Good call Susan on the Sedum sarmentosum.
J.C., photos please. Is your clematis actively growing now? You guys are awesome with all these helpful hints on sedum use.
Oh Julia, what a very cool plant. I asked Zuzu for help in making an entry in the database. I'm not sure how the handle the register & patent names. It is a Petrosedum rupestre subsp. rupestre, not a reflexum (synonym for rupestre subsp. rupestre).