Betula fontinalis vs Western birch

Betula fontinalis and Western birch both are nouns.

Word	Noun	Adjective	Verb	Adverb
Betula fontinalis	Yes	No	No	No
Western birch	Yes	No	No	No

As nouns, Betula fontinalis and Western birch are synonyms defined as:

Betula fontinalis and Western birch: birch of western United States resembling the paper birch but having brownish bark

Other synonyms of Betula fontinalis include mountain birch, swamp birch, water birch, Western paper birch.

Betula fontinalis (noun)	Western birch (noun)
birch of western United States resembling the paper birch but having brownish bark	birch of western United States resembling the paper birch but having brownish bark