Colorado spruce vs Picea pungens

Colorado spruce and Picea pungens both are nouns.

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

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

Colorado 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 spruce include Colorado blue spruce, silver spruce.

Colorado 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