Sugar Bowl Clematis
Clematis hirsutissima var. scottii
Such a flower - nodding heads of purple. Finely cut leaves make a mound with the purple bells rising above. They take patience to get established but then they live a long time.
Drought tolerant and they can take full sun to partial shade. 12" - 18" tall. Seed-heads are beautiful puffballs. I find them in mixed forests in dappled light. A great beauty. Stratify.