This is a Coreopsis Grandiflora. There are several kinds of coreopsis. This is my first year of including these in my containers. They seem pretty hardy.
I like this plant because of the way the flowers stand straight up on their stalks. I also like the way the light shines through the flowers in the afternoon.
Coreopsis flower heads have been used in the past to create a yellow dye for wool. The dried plant has been used as a substitute for coffee ... I'd have to be really deprived of caffiene to consider this option. And finally, the plant has been used as an astringent and emetic, in the olden days.