genus Encelia vs Compositae

genus Encelia and Compositae both are nouns.

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

genus Encelia (noun)	Compositae (noun)
genus of shrubs of southwestern United States and Mexico: brittlebush	plants with heads composed of many florets: aster, daisy, dandelion, goldenrod, marigold, lettuces, ragweed, sunflower, thistle, zinnia