Strange Cosmos flower

I haven't had a Cosmos flowering like this before...it's a more vigorous plant and later flowering than the others (normal white ones) I grew - either from a friend's seedlings or self-sown from last year's, difficult to know which, and sorry, I don't know the variety. I am agog to see how the florets turn out
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https://forum.gardenersworld.com/discussion/388011/fascinated-by-fasciation/p1