Picea engelmannii, with the common names Engelmann spruce, white spruce, mountain spruce, and silver spruce, is a species of spruce native to western North America. It is mostly a high-elevation mountain tree but also appears in watered canyons.
Picea engelmannii
Young tree
Forest floor under Engelmann spruces
Forest, with mature female cones in foreground
A spruce is a tree of the genus Picea, a genus of about 40 species of coniferous evergreen trees in the family Pinaceae, found in the northern temperate and boreal (taiga) regions of the Earth. Picea is the sole genus in the subfamily Piceoideae. Spruces are large trees, from about 20 to 60 m tall when mature, and have whorled branches and conical form.
Spruce
The peg-like base of the needles, or pulvinus, in Norway spruce (Picea abies)
Pulvini remain after the needles fall (white spruce, Picea glauca)
Manually decorticated trunk of a spruce as protection against bark beetles