tansy leaf aster vs wild flower

tansy leaf aster and wild flower both are nouns.

Word	Noun	Adjective	Verb	Adverb
tansy leaf aster	Yes	No	No	No
wild flower	Yes	No	No	No

As nouns, wild flower is a hypernym of tansy leaf aster; that is, wild flower is a word with a broader meaning than tansy leaf aster:

tansy leaf aster: wild aster with fernlike leaves and flower heads with very narrow bright purple rays; Alberta to Texas and Mexico
wild flower: wild or uncultivated flowering plant

Other hypernyms of tansy leaf aster include wildflower.

tansy leaf aster (noun)	wild flower (noun)
wild aster with fernlike leaves and flower heads with very narrow bright purple rays; Alberta to Texas and Mexico	wild or uncultivated flowering plant