Looks like this photo is a photo of moonbeam , not C.palmata.

Tinpins hasn't visited the site in the last 3 years, so our course of action will not require his/her agreement. I'm hesitant to identify it as a specific cultivar, however, so maybe it should just be moved to the generic entry for Coreopsis. What do you think?

I looked at her photo history(first page) and she seems to have placed that plant in moonbeam in another shot.
Same purple background.

Okay, Moonbeam it is! Thank you for this correction, Cinda.