five-flowered gentian vs Gentianella quinquefolia

five-flowered gentian and Gentianella quinquefolia both are nouns.

Word	Noun	Adjective	Verb	Adverb
five-flowered gentian	Yes	No	No	No
Gentianella quinquefolia	Yes	No	No	No

As nouns, five-flowered gentian and Gentianella quinquefolia are synonyms defined as:

five-flowered gentian and Gentianella quinquefolia: gentian of eastern North America having clusters of bristly blue flowers

Other synonyms of five-flowered gentian include ague weed, agueweed, Gentiana quinquefolia, stiff gentian.

five-flowered gentian (noun)	Gentianella quinquefolia (noun)
gentian of eastern North America having clusters of bristly blue flowers	gentian of eastern North America having clusters of bristly blue flowers