Coreopsis is a large group of plants related to the sunflower. They are commonly called tickseeds. The plants may be from 1.5 to 4 feet (46 to 120 centimeters) high. Their yellow, red, or maroon flowers look like daisies and grow on slender stems. Flowers of the coreopsis plant look like daisies and grow on slender sterns. Coreopsis plants grow as high as 4 feet (120 centimeters). They are commonly called tickseeds.
Coreopsis is the Greek word for bug. Most coreopsis plants are perennials and live for several years. But some are annuals and live only one season. A common annual coreopsis is often called calliopsis. Gardeners cultivate both perennial and annual coreopsis plants.
Scientific classification. Coreopsis plants form the genus Coreopsis in the composite family, Compositae. The scientific name for the calliopsis is C calliopsidea.