Picea Punguns Glauca (Blue Spruce)
The Blue Spruce (Picea pungens) is an evergreen tree that belongs to the pine family (Pinaceae). The name pungens has the tree due to the sharply pointed needles.:
The tree can be 25-30 m in height and may sometimes be 46 m tall. The blue spruce is native to the Rocky Mountains of Southeast Idaho, Utah, Colorado, New Mexico and Arizona and grows at 1800-3000 m altitude on mountain slopes along rivers, where they have sufficient water. In Canada, this species only occurs in bush form. In Alaska this species can even grow in soils with greater than 50 cm deep permanent frost, but then they remain very low.
The scaly bark is thin and peeling in small plates of 5-10 cm in length. The shape of the tree is conical, which with older trees are more cylindrical. The usually hairy shoots are orange-brown, with prominent pulvini. The leaves are needle-shaped, 1.5 to 3 cm long, rhombic in cross section and have a sharp point. The needles are dull gray-green to bright blue-gray. In wild populations, the color varies from tree to tree.
The slender cylindrical cones hang from the branches and are 6-12 cm long. When closed the cones 2 cm wide and when opening they are 4 cm wide. The thin papery scales are 2 to 2.4 cm long and have a wavy edge. The cones are reddish to violet, maturing pale brown. Five to seven months following pollination the cones are ripe. The black seeds are 3-4 mm long, with a delicate light brown wing
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