genus Taraxacum vs Compositae

genus Taraxacum and Compositae both are nouns.

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

genus Taraxacum (noun)	Compositae (noun)
an asterid dicot genus of the family Compositae including dandelions	plants with heads composed of many florets: aster, daisy, dandelion, goldenrod, marigold, lettuces, ragweed, sunflower, thistle, zinnia