Coreopsis - Lance-leaved Coreopsis ::: Thumbs ::: Next >> ::: I believe this to be Lance-leaved Coreopsis (Coreopsis lanceolata). The center part (disk) of the flower doesn't match other identifying photos I've seen, but this might simply be a very immature blossom. May 8, 2004. Big Frog Trail, Polk County, Tennessee. Photos copyright Gerald C and Cindy Williamson, 2004