Wow! If Sweet Autumn Clematis had those anthers, I wouldn't have minded its malicious plan to overwhelm everything else on my property.
My favorite is Josephine. I have several of them scattered around the garden, and they seem to take turns blooming. While one takes a rest, the others are in bloom.
I have a feeling I will love Diamantina, but the two I've bought so far have produced nothing but foliage to date.