alpine sunflower vs wildflower

alpine sunflower and wildflower both are nouns.

Word	Noun	Adjective	Verb	Adverb
alpine sunflower	Yes	No	No	No
wildflower	Yes	No	No	No

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

alpine sunflower: whitish hairy plant with featherlike leaves and a few stout stems each bearing an especially handsome solitary large yellow flower head; mountainous regions north central United States
wildflower: wild or uncultivated flowering plant

Other hypernyms of alpine sunflower include wild flower.

alpine sunflower (noun)	wildflower (noun)
whitish hairy plant with featherlike leaves and a few stout stems each bearing an especially handsome solitary large yellow flower head; mountainous regions north central United States	wild or uncultivated flowering plant