Tickseed is the common name for the plant Coreopsis, a group of 35 species of flowering plants in the Family Asteraceae and Genus Coreopsis. Twenty-eight species are native to the North America and the others come from Central and South America. The flowers are usually yellow with a toothed tip. The name is derived from the Greek word koris, meaning Bedbug. The plants are also popularly called "Calliopsis." This genus is primarily native to North America. Many cultivars are available for garde… (More on Coreopsis)