family Cruciferae vs genus Nasturtium

family Cruciferae and genus Nasturtium both are nouns.

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

family Cruciferae (noun)	genus Nasturtium (noun)
a large family of plants with four-petaled flowers; includes mustards, cabbages, broccoli, turnips, cresses, and their many relatives	a genus of seven plant species in the family Brassicaceae (Nasturtium)