Boykinia elata vs wild flower

Boykinia elata and wild flower both are nouns.

Word	Noun	Adjective	Verb	Adverb
Boykinia elata	Yes	No	No	No
wild flower	Yes	No	No	No

As nouns, wild flower is a hypernym of Boykinia elata; that is, wild flower is a word with a broader meaning than Boykinia elata:

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

Other hypernyms of Boykinia elata include wildflower.

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