Betula neoalaskana vs Yukon white birch

Betula neoalaskana and Yukon white birch both are nouns.

Word	Noun	Adjective	Verb	Adverb
Betula neoalaskana	Yes	No	No	No
Yukon white birch	Yes	No	No	No

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

Betula neoalaskana and Yukon white birch: Alaskan birch with white to pale brown bark

Betula neoalaskana (noun)	Yukon white birch (noun)
Alaskan birch with white to pale brown bark	Alaskan birch with white to pale brown bark