yellow flowers of large-flowered tickseed or coreopsis grandiflora

august background beautiful beauty bloom blooming blossom botanical botany bright closeup color colorful coreopsis coreopsislanceolata environment field flora floral flower flowerbed flowered floweredtickseed flowers freshair garden gardenflowers green group insect isolated lance lanceleaf large leaved macro natural nature outdoor outdoors petal petals plant pollen pretty season spring summer tickseed yellow