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Columbia Encyclopedia entry: spruce
Spruce, any plant of the genus Picea, evergreen trees or shrubs of the family Pinaceae (pine family) widely distributed in the Northern Hemisphere. The needles are angular in cross section, rather than flattened as in the related hemlocks and firs. The Norway spruce (P. abies), an important timber tree of Europe, is one of the most commonly cultivated evergreens. The Siberian spruce (P. obovata) grows in coniferous forests (taiga) of Russia and Siberia, the Oriental spruce (P. orientalis) is a major species of S Europe, and the yeddo spruce (P. jezoensis) of Manchuria and Japan is sometimes dwarfed and potted (see dwarf tree). North American spruces used for timber are the red spruce (P. rubens), white spruce (P. glauca), and black spruce (P. mariana) of the East; the Engelmann spruce (P. engelmanii) of the Rocky Mountain forests; and the Sitka spruce (P. sitchensis) of the Pacific forest belt. Numerous spruces are cultivated as ornamentals; the most popular North American garden spruce is the frosty- or silvery-blue-needled Colorado blue spruce (P. pungens). Commercially, spruces are of particular value as a major source of pulpwood for the manufacture of paper. Wood of the various species is usually light, soft, and straight-grained and has been used for interior and exterior construction work, boats, airplanes, and woodenware. The bark is sometimes used for tanning, and some species yield a gum resin. Spruce beer has been made from the young shoots of the red spruce and the black spruce. Native Americans in the West have used spruce gum for caulking, the inner bark for food, and strips of spruce for weaving watertight mats and baskets. Spruce is classified in the division Pinophyta, class Pinopsida, order Coniferales, family Pinaceae.
Wikipedia search results for: Spruce
From Wikipedia, the free encyclopedia
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 regions of the earth. Spruces are large trees, from 20–60 m 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 4–10 years old, leaving the branches rough with the retained pulvinus. Spruces are used as food plants by the larvae of some Lepidoptera...more »
Columbia Encyclopedia search results: spruce
Results 1 - 10  of 23
  • Raritan

    Raritan, river, 85 mi (137 km) long, rising in N central N.J., and flowing generally SE to Raritan Bay, an arm of Lower New York Bay, at Perth Amboy. Through pumping the Raritan supplies water...

  • Unalaska

    Unalaska, rugged island, 30 mi (48 km) long, off SW Alaska, one of the largest Aleutian Islands. Visited (c.1759) by Russian explorers, the island was a center of Russian fur trade until it wa...

  • chewing gum

    Chewing gum, confection consisting usually of chicle, flavorings, and corn syrup and sugar (or artificial sweeteners). Prehistoric people are believed to have chewed resins. Spruce resin was c...

  • Allegheny Plateau

    Allegheny Plateau, dissected plateau, western part of the Appalachian Mts., extending c.500 mi (800 km) SW from N Pa. to SW Va., rising to c.4,860 ft (1,480 m) at Spruce Knob, the highest peak...

  • McMinnville

    McMinnville, city (1990 pop. 17,894), seat of Yamhill co., NW Oreg.; inc. 1876. It is a trade and processing center in the fertile Willamette valley. Foods, textiles, and building materials ar...

  • clapboard

    Clapboard, board used for the exterior finish of a wood-framed building and attached horizontally to the wood studs. The word, in its original and strict use, refers to a product of New Englan...

  • Nelson, river, Canada

    Nelson, river, c.400 mi (640 km) long, issuing from the northeast end of Lake Winnipeg, central Man., Canada, and flowing NE to Hudson Bay at Port Nelson. With the Bow–South Saskatchewan–Saska...

  • sawfly

    Sawfly, common name for insects of several families of the order Hymenoptera, which also includes the ants, wasps, and bees. Sawflies are named for the two sawtoothed blades of the female's ov...

  • taiga

    Taiga, northern coniferous-forest belt of Eurasia, bordered on the north by the treeless tundra and on the south by the steppe. This vast belt, comprising about one third of the forest land of...

  • bonsai

    Bonsai, art of cultivating dwarf trees. Bonsai, developed by the Japanese more than a thousand years ago, is derived from the Chinese practice of growing miniature plants. In bonsai cultivatio...

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