Stenotus acaulis vs wildflower

Stenotus acaulis and wildflower both are nouns.

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

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

Stenotus acaulis: dark green erect herb of northwestern United States and southwestern Canada having stiff leaves in dense tufts and yellow flower heads; sometimes placed in genus Haplopappus
wildflower: wild or uncultivated flowering plant

Other hypernyms of Stenotus acaulis include wild flower.

Stenotus acaulis (noun)	wildflower (noun)
dark green erect herb of northwestern United States and southwestern Canada having stiff leaves in dense tufts and yellow flower heads; sometimes placed in genus Haplopappus	wild or uncultivated flowering plant