mustard family vs genus Stephanomeria

mustard family and genus Stephanomeria both are nouns.

Word	Noun	Adjective	Verb	Adverb
mustard family	Yes	No	No	No
genus Stephanomeria	Yes	No	No	No

mustard family (noun)	genus Stephanomeria (noun)
a large family of plants with four-petaled flowers; includes mustards, cabbages, broccoli, turnips, cresses, and their many relatives	malheur wire lettuce