Syringa reticulata vs Syringa amurensis japonica

Syringa reticulata and Syringa amurensis japonica both are nouns.

Word	Noun	Adjective	Verb	Adverb
Syringa reticulata	Yes	No	No	No
Syringa amurensis japonica	Yes	No	No	No

As nouns, Syringa reticulata and Syringa amurensis japonica are synonyms defined as:

Syringa reticulata and Syringa amurensis japonica: small tree of Japan having narrow pointed leaves and creamy-white flowers

Other synonyms of Syringa reticulata include Japanese tree lilac.

Syringa reticulata (noun)	Syringa amurensis japonica (noun)
small tree of Japan having narrow pointed leaves and creamy-white flowers	small tree of Japan having narrow pointed leaves and creamy-white flowers