family Cruciferae vs genus Matthiola

family Cruciferae and genus Matthiola both are nouns.

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

family Cruciferae (noun)	genus Matthiola (noun)
a large family of plants with four-petaled flowers; includes mustards, cabbages, broccoli, turnips, cresses, and their many relatives	genus of Old World plants grown as ornamentals