Picea breweriana vs Brewer's spruce

Picea breweriana and Brewer's spruce both are nouns.

Word	Noun	Adjective	Verb	Adverb
Picea breweriana	Yes	No	No	No
Brewer's spruce	Yes	No	No	No

As nouns, Picea breweriana and Brewer's spruce are synonyms defined as:

Picea breweriana and Brewer's spruce: medium-sized spruce of California and Oregon having pendulous branches

Other synonyms of Picea breweriana include weeping spruce.

Picea breweriana (noun)	Brewer's spruce (noun)
medium-sized spruce of California and Oregon having pendulous branches	medium-sized spruce of California and Oregon having pendulous branches