silky willow vs Salix sericea

silky willow and Salix sericea both are nouns.

Word	Noun	Adjective	Verb	Adverb
silky willow	Yes	No	No	No
Salix sericea	Yes	No	No	No

As nouns, silky willow and Salix sericea are synonyms defined as:

silky willow and Salix sericea: North American willow with greyish silky pubescent leaves that usually blacken in drying

Other synonyms of silky willow include Salix alba sericea, silver willow.

silky willow (noun)	Salix sericea (noun)
North American willow with greyish silky pubescent leaves that usually blacken in drying	North American willow with greyish silky pubescent leaves that usually blacken in drying
small shrubby tree of western North America (Alaska to Oregon)