perianth vs floral envelope

perianth and floral envelope both are nouns.

Word	Noun	Adjective	Verb	Adverb
perianth	Yes	No	No	No
floral envelope	Yes	No	No	No

As nouns, perianth and floral envelope are synonyms defined as:

perianth and floral envelope: collective term for the outer parts of a flower consisting of the calyx and corolla and enclosing the stamens and pistils

Other synonyms of perianth include chlamys, perigone, perigonium.

perianth (noun)	floral envelope (noun)
collective term for the outer parts of a flower consisting of the calyx and corolla and enclosing the stamens and pistils	collective term for the outer parts of a flower consisting of the calyx and corolla and enclosing the stamens and pistils