Blue Spruce Picea pungens Engelm. Colorado blue spruce, or blue spruce, is an attractive tree often used for Christmas trees or as ornamentals. It has a narrow, pyramidal shape and cone-shaped crown. As trees become older, they often take on a more irregular appearance. . They are 4-sided and have a very sharp point on the end.
Needles are generally dull bluish-gray to silvery blue and emit a resinous odor when crushed.
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