American gray birch vs Betula populifolia

American gray birch and Betula populifolia both are nouns.

Word	Noun	Adjective	Verb	Adverb
American gray birch	Yes	No	No	No
Betula populifolia	Yes	No	No	No

As nouns, American gray birch and Betula populifolia are synonyms defined as:

American gray birch and Betula populifolia: medium-sized birch of eastern North America having white or pale grey bark and valueless wood; occurs often as a second-growth forest tree

Other synonyms of American gray birch include American grey birch, gray birch, grey birch.

American gray birch (noun)	Betula populifolia (noun)
medium-sized birch of eastern North America having white or pale grey bark and valueless wood; occurs often as a second-growth forest tree	medium-sized birch of eastern North America having white or pale grey bark and valueless wood; occurs often as a second-growth forest tree