cruciferous plant vs family Cruciferae

cruciferous plant and family Cruciferae both are nouns.

Word	Noun	Adjective	Verb	Adverb
cruciferous plant	Yes	No	No	No
family Cruciferae	Yes	No	No	No

cruciferous plant (noun)	family Cruciferae (noun)
any of various plants of the family Cruciferae	a large family of plants with four-petaled flowers; includes mustards, cabbages, broccoli, turnips, cresses, and their many relatives