family Brassicaceae vs genus Hesperis

family Brassicaceae and genus Hesperis both are nouns.

Word	Noun	Adjective	Verb	Adverb
family Brassicaceae	Yes	No	No	No
genus Hesperis	Yes	No	No	No

family Brassicaceae (noun)	genus Hesperis (noun)
a large family of plants with four-petaled flowers; includes mustards, cabbages, broccoli, turnips, cresses, and their many relatives	biennial or perennial erect herbs having nocturnally fragrant flowers