Rananculus repens, Creeping Buttercup
Single yellow flower of Rananculus repens, Creeping Buttercup, in tall green grass.
Coreopsis tinctoria, Coreopsis
Yellow and red flowes of Coreopsis tinctoria, Coreopsis, against a green background.
Echinacea purpurea 'Harvest Moon', Coneflower
Single upright yellow flower of Echinacea purpurea 'Harvest Moon', Coneflower, with drooping petals.