Betula pubescens vs white birch

Betula pubescens and white birch both are nouns.

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

As nouns, Betula pubescens and white birch are synonyms defined as:

Betula pubescens and white birch: European birch with dull white to pale brown bark and somewhat drooping hairy branches

Other synonyms of Betula pubescens include downy birch.

Betula pubescens (noun)	white birch (noun)
European birch with dull white to pale brown bark and somewhat drooping hairy branches	European birch with dull white to pale brown bark and somewhat drooping hairy branches