family Cruciferae vs cruciferous plant

family Cruciferae and cruciferous plant both are nouns.

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

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