upland white aster vs Aster ptarmicoides

upland white aster and Aster ptarmicoides both are nouns.

Word	Noun	Adjective	Verb	Adverb
upland white aster	Yes	No	No	No
Aster ptarmicoides	Yes	No	No	No

As nouns, upland white aster and Aster ptarmicoides are synonyms defined as:

upland white aster and Aster ptarmicoides: tufted rigid North American perennial with loose clusters of white flowers

upland white aster (noun)	Aster ptarmicoides (noun)
tufted rigid North American perennial with loose clusters of white flowers	tufted rigid North American perennial with loose clusters of white flowers