coast boykinia vs wildflower

coast boykinia and wildflower both are nouns.

Word	Noun	Adjective	Verb	Adverb
coast boykinia	Yes	No	No	No
wildflower	Yes	No	No	No

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

coast boykinia: plant with leaves mostly at the base and openly branched clusters of small white flowers; western North America
wildflower: wild or uncultivated flowering plant

Other hypernyms of coast boykinia include wild flower.

coast boykinia (noun)	wildflower (noun)
plant with leaves mostly at the base and openly branched clusters of small white flowers; western North America	wild or uncultivated flowering plant