family Gramineae vs genus Paspalum

family Gramineae and genus Paspalum both are nouns.

Word	Noun	Adjective	Verb	Adverb
family Gramineae	Yes	No	No	No
genus Paspalum	Yes	No	No	No

family Gramineae (noun)	genus Paspalum (noun)
the grasses: chiefly herbaceous but some woody plants including cereals, bamboo, reeds, sugar cane	a genus of perennial grasses of warm regions