Babylonian weeping willow vs Salix babylonica

Babylonian weeping willow and Salix babylonica both are nouns.

Word	Noun	Adjective	Verb	Adverb
Babylonian weeping willow	Yes	No	No	No
Salix babylonica	Yes	No	No	No

As nouns, Babylonian weeping willow and Salix babylonica are synonyms defined as:

Babylonian weeping willow and Salix babylonica: willow with long drooping branches and slender leaves native to China; widely cultivated as an ornamental

Other synonyms of Babylonian weeping willow include weeping willow.

Babylonian weeping willow (noun)	Salix babylonica (noun)
willow with long drooping branches and slender leaves native to China; widely cultivated as an ornamental	willow with long drooping branches and slender leaves native to China; widely cultivated as an ornamental