A

David

Darling

sepal

sepals and petals

A sepal is a modified leaf and member of the outermost whorl of a flowering plant (angiosperm) which surrounds the petals. Collectively, the sepals constitute the calyx. Although usually green and inconspicuous once the flower is open, in some species, such as orchids, the sepals look like the petals. In other species, such as anemones, the sepals are absent.