This is the true grandfather species of them all—the basic annual sunflower that figured so prominently in Native American ritual, fabric making, and foods. Flowers are only about 3-4 inches across, rather like a large, single black-eyed susan on rangy, 3-foot, sandpapery plants. Do not confuse this one with its hundreds of descendants including the garden giants with huge, seed filled centers—they’re all hybrids of this species. State flower of Kansas.