Babylonian weeping willow vs Salix

Babylonian weeping willow and Salix both are nouns.

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

Babylonian weeping willow (noun)	Salix (noun)
willow with long drooping branches and slender leaves native to China; widely cultivated as an ornamental	a large and widespread genus varying in size from small shrubs to large trees: willows