Blue Spruce: Colorado blue spruce, or blue spruce, is an attractive tree often used for Christmas trees.  It has pointy needles that are 1-1 1/2 inches long on lower branches but somewhat shorter on upper branches. 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.

Trivia: It is the official state tree of both Colorado and Utah. The species generally reaches a height of 65-115 feet at maturity with a diameter of 2-3 feet and may reach ages of 600-800 years.

Its pointy needles gave this species its name "pungens", from the Latin word for sharp as in puncture wound.