Perigone

Noun

per=i=gone

WORDNET DICTIONARY

perigone(n = noun.plant) chlamys, floral envelope, perianth, perigonium - collective term for the outer parts of a flower consisting of the calyx and corolla and enclosing the stamens and pistils;

is a kind of cover, covering, natural covering, plant organ

is a part of bloom, blossom, flower

has parts: corolla, calyx

has particulars: falls

Perigone, n. [Pref. peri- + Gr. productive organs.].

Any organ inclosing the essential organs of a flower; a perianth. [1913 Webster]
A sac which surrounds the generative bodies in the gonophore of a hydroid. [1913 Webster]