Pyrola americana vs Pyrola rotundifolia americana

Pyrola americana and Pyrola rotundifolia americana both are nouns.

Word	Noun	Adjective	Verb	Adverb
Pyrola americana	Yes	No	No	No
Pyrola rotundifolia americana	Yes	No	No	No

As nouns, Pyrola americana and Pyrola rotundifolia americana are synonyms defined as:

Pyrola americana and Pyrola rotundifolia americana: evergreen of eastern North America with leathery leaves and numerous white flowers

Other synonyms of Pyrola americana include false wintergreen.

Pyrola americana (noun)	Pyrola rotundifolia americana (noun)
evergreen of eastern North America with leathery leaves and numerous white flowers	evergreen of eastern North America with leathery leaves and numerous white flowers