ragwort vs wildflower

ragwort and wildflower both are nouns.

Word	Noun	Adjective	Verb	Adverb
ragwort	Yes	No	No	No
wildflower	Yes	No	No	No

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

Other hypernyms of ragwort include wild flower.

ragwort (noun)	wildflower (noun)
widespread European weed having yellow daisylike flowers; sometimes an obnoxious weed and toxic to cattle if consumed in quantity	wild or uncultivated flowering plant
American ragwort with yellow flowers