Fringeleaf tickseed (Coreopsis integrifolia) is a perennial that can grow from 1.5 to 2.5 feet tall and spreads in clumps 1-2 feet wide. The flowers are yellow with a dark center. It thrives in moist to wet soils with full sun to part shade. It can easily grow in Florida's heat and humid weather, and is a great nectar source for butterflies. Coreopsis integrifolia is listed as an endangered species by the State of Florida.