genus Layia vs Compositae

genus Layia and Compositae both are nouns.

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

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