family Labiatae vs genus Melissa

family Labiatae and genus Melissa both are nouns.

Word	Noun	Adjective	Verb	Adverb
family Labiatae	Yes	No	No	No
genus Melissa	Yes	No	No	No

family Labiatae (noun)	genus Melissa (noun)
a large family of aromatic herbs and shrubs having flowers resembling the lips of a mouth and four-lobed ovaries yielding four one-seeded nutlets and including mint, thyme, sage, rosemary	a genus of Old World mints of the family Labiatae