green ash vs Fraxinus pennsylvanica subintegerrima

green ash and Fraxinus pennsylvanica subintegerrima both are nouns.

Word	Noun	Adjective	Verb	Adverb
green ash	Yes	No	No	No
Fraxinus pennsylvanica subintegerrima	Yes	No	No	No

As nouns, green ash and Fraxinus pennsylvanica subintegerrima are synonyms defined as:

green ash and Fraxinus pennsylvanica subintegerrima: a variety of red ash having glossy branchlets and lower leaf surfaces

green ash (noun)	Fraxinus pennsylvanica subintegerrima (noun)
a variety of red ash having glossy branchlets and lower leaf surfaces	a variety of red ash having glossy branchlets and lower leaf surfaces