family Brassicaceae vs genus Physaria

family Brassicaceae and genus Physaria both are nouns.

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

family Brassicaceae (noun)	genus Physaria (noun)
a large family of plants with four-petaled flowers; includes mustards, cabbages, broccoli, turnips, cresses, and their many relatives	small genus of western North American herbs similar to Lesquerella: bladderpods