family Compositae vs genus Ratibida

family Compositae and genus Ratibida both are nouns.

Word	Noun	Adjective	Verb	Adverb
family Compositae	Yes	No	No	No
genus Ratibida	Yes	No	No	No

family Compositae (noun)	genus Ratibida (noun)
plants with heads composed of many florets: aster, daisy, dandelion, goldenrod, marigold, lettuces, ragweed, sunflower, thistle, zinnia	genus of perennial wildflowers of North American plains and prairies; often cultivated for their showy flower heads