Compositae vs genus Liatris

Compositae and genus Liatris both are nouns.

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

Compositae (noun)	genus Liatris (noun)
plants with heads composed of many florets: aster, daisy, dandelion, goldenrod, marigold, lettuces, ragweed, sunflower, thistle, zinnia	genus of perennial North American herbs with aromatic usually cormous roots