family Gramineae vs genus Schizachyrium

family Gramineae and genus Schizachyrium both are nouns.

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

family Gramineae (noun)	genus Schizachyrium (noun)
the grasses: chiefly herbaceous but some woody plants including cereals, bamboo, reeds, sugar cane	overlaps the genus Andropogon