genus Hypochaeris vs Compositae

genus Hypochaeris and Compositae both are nouns.

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

genus Hypochaeris (noun)	Compositae (noun)
widely distributed genus of herbs with milky juice; includes some cosmopolitan weeds	plants with heads composed of many florets: aster, daisy, dandelion, goldenrod, marigold, lettuces, ragweed, sunflower, thistle, zinnia