gaillardia vs wild flower

gaillardia and wild flower both are nouns.

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

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

gaillardia: any plant of western America of the genus Gaillardia having hairy leaves and long-stalked flowers in hot vibrant colors from golden yellow and copper to rich burgundy
wild flower: wild or uncultivated flowering plant

Other hypernyms of gaillardia include wildflower.

gaillardia (noun)	wild flower (noun)
any plant of western America of the genus Gaillardia having hairy leaves and long-stalked flowers in hot vibrant colors from golden yellow and copper to rich burgundy	wild or uncultivated flowering plant