family Compositae vs genus Pulicaria

family Compositae and genus Pulicaria both are nouns.

Word	Noun	Adjective	Verb	Adverb
family Compositae	Yes	No	No	No
genus Pulicaria	Yes	No	No	No

family Compositae (noun)	genus Pulicaria (noun)
plants with heads composed of many florets: aster, daisy, dandelion, goldenrod, marigold, lettuces, ragweed, sunflower, thistle, zinnia	genus of temperate Old World herbs: fleabane