family Compositae vs genus Layia

family Compositae and genus Layia both are nouns.

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

family Compositae (noun)	genus Layia (noun)
plants with heads composed of many florets: aster, daisy, dandelion, goldenrod, marigold, lettuces, ragweed, sunflower, thistle, zinnia	genus of western United States annuals with showy yellow or white flowers