American white birch vs Betula

American white birch and Betula both are nouns.

Word	Noun	Adjective	Verb	Adverb
American white birch	Yes	No	No	No
Betula	Yes	No	No	No

American white birch (noun)	Betula (noun)
small American birch with peeling white bark often worked into e.g. baskets or toy canoes	a genus of trees of the family Betulaceae (such as birches)