floral envelope vs chlamys

floral envelope and chlamys both are nouns.

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

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

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

Other synonyms of floral envelope include perianth, perigone, perigonium.

floral envelope (noun)	chlamys (noun)
collective term for the outer parts of a flower consisting of the calyx and corolla and enclosing the stamens and pistils	a short mantle or cape fastened at the shoulder; worn by men in ancient Greece
	collective term for the outer parts of a flower consisting of the calyx and corolla and enclosing the stamens and pistils