golden aster vs wildflower

golden aster and wildflower both are nouns.

Word	Noun	Adjective	Verb	Adverb
golden aster	Yes	No	No	No
wildflower	Yes	No	No	No

As nouns, wildflower is a hypernym of golden aster; that is, wildflower is a word with a broader meaning than golden aster:

golden aster: any of several shrubby herbs or subshrubs of the genus Chrysopsis having bright golden-yellow flower heads that resemble asters; throughout much of United States and into Canada
wildflower: wild or uncultivated flowering plant

Other hypernyms of golden aster include wild flower.

golden aster (noun)	wildflower (noun)
any of several shrubby herbs or subshrubs of the genus Chrysopsis having bright golden-yellow flower heads that resemble asters; throughout much of United States and into Canada	wild or uncultivated flowering plant