family Cruciferae vs genus Cochlearia

family Cruciferae and genus Cochlearia both are nouns.

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

family Cruciferae (noun)	genus Cochlearia (noun)
a large family of plants with four-petaled flowers; includes mustards, cabbages, broccoli, turnips, cresses, and their many relatives	a genus of the family Cruciferae, commonly known as scurvy-grass (Cochlearia)