Coreopsis gladiata (coastalplain tickseed) is a North American species of perennial tickseeds in the sunflower family. It is native to the southeastern United States from eastern Texas to southeastern Virginia, primarily to the coastal plain. Coreopsis gladiata is a perennial herb up to 70 cm (28 inches) tall. Flower heads have yellow ray florets and purple disc florets. The species grows in swamps, bogs, depressions, and pine barrens.