Salix tristis vs dwarf grey willow

Salix tristis and dwarf grey willow both are nouns.

Word	Noun	Adjective	Verb	Adverb
Salix tristis	Yes	No	No	No
dwarf grey willow	Yes	No	No	No

As nouns, Salix tristis and dwarf grey willow are synonyms defined as:

Salix tristis and dwarf grey willow: willow shrub of dry places in the eastern United States having long narrow leaves canescent beneath

Other synonyms of Salix tristis include dwarf gray willow, sage willow.

Salix tristis (noun)	dwarf grey willow (noun)
willow shrub of dry places in the eastern United States having long narrow leaves canescent beneath	willow shrub of dry places in the eastern United States having long narrow leaves canescent beneath