This is Helianthus pauciflorus also known as Prairie Sunflower, Helianthus rigidus, H. laetiflorus, Stiff Sunflower, and Showy Sunflower. Plant this one in the full sun. Not only will the plant love it, but so will the bees, birds, and butterflies. This sunflower is larval host to the Bordered Patch, Spring Azure, Painted Lady, Gorgone Checkerspot and Silvery Checkerspot butterflies. USDA Hardiness Zones 3 to 7.