12+ Ohio State Flower. Web ohio designated the red carnation (dianthus caryophyllus) as the official state flower in 1904. Web ohio can thank superstitious president william mckinley for its state flower:
The act naming the carnation as the state flower specified the scarlet carnation for the memory of william mckinley. On february 3, 1904, the ohio general assembly passed a resolution providing for a state flower to be chosen. Web the white trillium is the official wildflower of ohio.