family Cruciferae vs genus Stephanomeria

family Cruciferae and genus Stephanomeria both are nouns.

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

family Cruciferae (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