coreopsis genus --- Aster subfamily 3.1
Aster 3.1 (Genus A to F) -- Aster 3.2 (Genus G to O) -- Aster 3.3 (Genus P to R) -- Aster 3.4 (Genus S to Z)
lanceleaf tickseed (Coreopsis lanceolata) -- in June -- Lions Open Space, Larimer County, CO
plains coreopsis (Coreopsis tinctoria) -- in August -- North Shields Ponds, a Fort Collins Natural Area, CO