Colorado blue spruce vs Picea pungens

Colorado blue spruce and Picea pungens both are nouns.

Word	Noun	Adjective	Verb	Adverb
Colorado blue spruce	Yes	No	No	No
Picea pungens	Yes	No	No	No

As nouns, Colorado blue spruce and Picea pungens are synonyms defined as:

Colorado blue spruce and Picea pungens: tall spruce with blue-green needles and dense conic crown; older trees become columnar with lower branches sweeping downward

Other synonyms of Colorado blue spruce include Colorado spruce, silver spruce.

Colorado blue spruce (noun)	Picea pungens (noun)
tall spruce with blue-green needles and dense conic crown; older trees become columnar with lower branches sweeping downward	tall spruce with blue-green needles and dense conic crown; older trees become columnar with lower branches sweeping downward