coneflower vs wild flower

coneflower and wild flower both are nouns.

Word	Noun	Adjective	Verb	Adverb
coneflower	Yes	No	No	No
wild flower	Yes	No	No	No

As nouns, wild flower is a hypernym of coneflower; that is, wild flower is a word with a broader meaning than coneflower:

Other hypernyms of coneflower include wildflower.

coneflower (noun)	wild flower (noun)
any of various perennials of the eastern United States having thick rough leaves and long-stalked showy flowers with drooping rays and a conelike center	wild or uncultivated flowering plant
any of various plants of the genus Rudbeckia cultivated for their large usually yellow daisies with prominent central cones
a wildflower of the genus Ratibida