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Spruce Trees In Morning Fog Denali National Park Alaska Usa Stock PhotoAlaska - USA State,Beauty In Nature,Color Image,Denali National Park,Dusk,Fog,Forest,High Angle View,Horizontal,Landscape,Morning,National Park,No People,Outdoors,Photography,Scenics,Silhouette,Spruce Tree,Tranquility,Tree,USA,WildernessPhotographer Gallo ImagesCollection: Brand X Pictures A spruce is a tree of the genus Picea, a genus of about 35 species of coniferous evergreen trees in the Family Pinaceae, found in the northern temperate and boreal (taiga) regions of the earth. Spruces are large trees, from 2060 metres (66200 ft) tall when mature, and can be distinguished by their whorled branches and conical form. The needles, or leaves, of spruce trees are attached singly to the branches in a spiral fashion, each needle on a small peg-like structure called a pulvinus. The needles are shed when 410 years old, leaving the branches rough with the retained pulvinus (an easy means of distinguishing them from other similar genera, where the branches are fairly smooth).