Gentianella quinquefolia vs Gentiana quinquefolia

Gentianella quinquefolia and Gentiana quinquefolia both are nouns.

Word	Noun	Adjective	Verb	Adverb
Gentianella quinquefolia	Yes	No	No	No
Gentiana quinquefolia	Yes	No	No	No

As nouns, Gentianella quinquefolia and Gentiana quinquefolia are synonyms defined as:

Gentianella quinquefolia and Gentiana quinquefolia: gentian of eastern North America having clusters of bristly blue flowers

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

Gentianella quinquefolia (noun)	Gentiana quinquefolia (noun)
gentian of eastern North America having clusters of bristly blue flowers	gentian of eastern North America having clusters of bristly blue flowers