calyx

nouns

(botany) the whorl of sepals of a flower collectively forming the outer floral envelope or layer of the perianth enclosing and supporting the developing bud; usually green
is derived from
is a part of
collective term for the outer parts of a flower consisting of the calyx and corolla and enclosing the stamens and pistils
domain category
the branch of biology that studies plants
is a type of (narrower)
a round shape formed by a series of concentric circles (as formed by leaves or flower petals)