blue sage vs Salvia farinacea

blue sage and Salvia farinacea both are nouns.

Word	Noun	Adjective	Verb	Adverb
blue sage	Yes	No	No	No
Salvia farinacea	Yes	No	No	No

As nouns, blue sage and Salvia farinacea are synonyms defined as:

blue sage and Salvia farinacea: Texas sage having intensely blue flowers

Other synonyms of blue sage include mealy sage.

blue sage (noun)	Salvia farinacea (noun)
aromatic shrub of arid regions of western North America having hoary leaves	Texas sage having intensely blue flowers
blue-flowered sage of dry prairies of the eastern United States
Texas sage having intensely blue flowers
sage of western North America to Central America having violet-blue flowers; widespread in cultivation