The Black-eyed Susan vine is a fast-growing, tender perennial (often grown as an annual) native to tropical Africa, prized for its 1–3 inch, five-petaled, trumpet-shaped flowers, typically in yellow, orange, or white with a distinct dark purple/black center. It thrives in full sun and, as a twining climber, can reach 8–10 feet in a single season on trellises, arbors, or in hanging baskets.