family Compositae vs genus Pyrethrum

family Compositae and genus Pyrethrum both are nouns.

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

family Compositae (noun)	genus Pyrethrum (noun)
plants with heads composed of many florets: aster, daisy, dandelion, goldenrod, marigold, lettuces, ragweed, sunflower, thistle, zinnia	used in former classifications for plants later placed in genus Chrysanthemum and now often included in genus Tanacetum