This is Helianthus salicifolius, also known as Willowleaf Sunflower. These plants like to live in full sun where they attract birds, bees, and butterflies and are somewhat deer resistant. This plant is endangered in Texas. This plant is a larval host for the Oblique-striped Emerald Moth, and the Silvery Checkerspot, Bordered Patch, and Gorgone Checkerspot butterflies. USDA Hardiness Zones 5 to 9