Free high resolution photo of a pink or magenta colored cosmos flower. Garden Cosmos (Cosmos Bipinnatus) also called the Mexican Aster is a flowering ornamental plant native to Mexico. Cosmos is an annual flowering plant with flowers ranging in color from pink to purple. They are a great way to add a splash of color to any garden. This photo shows a flower which is a deep pink or magenta in color. You can also see two unopened buds on the plant. Free picture for any use.