The Calyx
THE calyx is green.
The calyx is strong.
The calyx protects the ovary.
It has five sepals - five green sepals.
They overlap like the tiles on a roof and thus protect the ovary from rain. They also protect it from insects that otherwise might destroy it.
The calyx covers the base of the corolla and forms a green urn, a little vase, in which to hold it secure from harm.
It is not bright and delicate like the corolla, but what would the flower do without it?