Are you sure it was from me? I will look up my trade lists when I get home.

I have Rudbeckia herbstonne and Helianthus maximilliani which both have yellow flowers. However,the leaves of Herbstonne are different from those in your pic, and the H. maximilliani petals are not droopy although the leaves are similar.

Susan

ID'ed it - Rudbeckia lacianata

Rudbeckia lacinata "cutleaf conflower" has deeply serrated leaves as in the link below. I do have R. lacinata but it is the double form "Goldquelle" and it doesn't resemble your plant at all. I think someone else must have given it to you.
Susan

Here is a link that might be useful: Rudbeckia lacinata leaves.