Hymenoxys acaulis vs wildflower

Hymenoxys acaulis and wildflower both are nouns.

Word	Noun	Adjective	Verb	Adverb
Hymenoxys acaulis	Yes	No	No	No
wildflower	Yes	No	No	No

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

Hymenoxys acaulis: perennial having tufted basal leaves and short leafless stalks each bearing a solitary yellow flower head; dry hillsides and plains of west central North America
wildflower: wild or uncultivated flowering plant

Other hypernyms of Hymenoxys acaulis include wild flower.

Hymenoxys acaulis (noun)	wildflower (noun)
perennial having tufted basal leaves and short leafless stalks each bearing a solitary yellow flower head; dry hillsides and plains of west central North America	wild or uncultivated flowering plant