Engelmann spruce vs Picea engelmannii

Engelmann spruce and Picea engelmannii both are nouns.

Word	Noun	Adjective	Verb	Adverb
Engelmann spruce	Yes	No	No	No
Picea engelmannii	Yes	No	No	No

As nouns, Engelmann spruce and Picea engelmannii are synonyms defined as:

Engelmann spruce and Picea engelmannii: tall spruce of Rocky Mountains and British Columbia with blue-green needles and acutely conic crown; wood used for rough lumber and boxes

Other synonyms of Engelmann spruce include Engelmann's spruce.

Engelmann spruce (noun)	Picea engelmannii (noun)
tall spruce of Rocky Mountains and British Columbia with blue-green needles and acutely conic crown; wood used for rough lumber and boxes	tall spruce of Rocky Mountains and British Columbia with blue-green needles and acutely conic crown; wood used for rough lumber and boxes