Wisconsin weeping willow vs Salix

Wisconsin weeping willow and Salix both are nouns.

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

Wisconsin weeping willow (noun)	Salix (noun)
hybrid willow usually not strongly weeping in habit	a large and widespread genus varying in size from small shrubs to large trees: willows