sand verbena vs wildflower

sand verbena and wildflower both are nouns.

Word	Noun	Adjective	Verb	Adverb
sand verbena	Yes	No	No	No
wildflower	Yes	No	No	No

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

sand verbena: any of various plants of the genus Abronia of western North America and Mexico having flowers resembling verbena
wildflower: wild or uncultivated flowering plant

Other hypernyms of sand verbena include wild flower.

sand verbena (noun)	wildflower (noun)
any of various plants of the genus Abronia of western North America and Mexico having flowers resembling verbena	wild or uncultivated flowering plant