Compositae vs genus Ursinia

Compositae and genus Ursinia both are nouns.

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

Compositae (noun)	genus Ursinia (noun)
plants with heads composed of many florets: aster, daisy, dandelion, goldenrod, marigold, lettuces, ragweed, sunflower, thistle, zinnia	genus of South African herbs and shrubs cultivated as ornamentals