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Picea glauca (Moench) Voss., the White Spruce, [4] is a species of spruce native to the northern temperate and boreal forests in Canada and United States, North America.. Picea glauca is native from central Alaska all through the east, across western and southern/central Canada to the Avalon Peninsula in Newfoundland, Quebec, Ontario and south to Montana, North Dakota, Minnesota, Wisconsin ...
Picea engelmannii, with the common names Engelmann spruce, [3] white spruce, [3] mountain spruce, [3] and silver spruce, [3] is a species of spruce native to western North America. It is mostly a high-elevation mountain tree but also appears in watered canyons.
The members of the pine family (pines, spruces, firs, cedars, larches, etc.) have cones that are imbricate (that is, with scales overlapping each other like fish scales).). These cones, especially the woody female cones, are considered the "archetypal" tree cones.The female cone has two types of scale: the bract scales, and the seed scales (or ovuliferous scales), one subtended by each bract ...
The peg-like base of the needles, or pulvinus, in Norway spruce (Picea abies) Pulvini remain after the needles fall (white spruce, Picea glauca). Determining that a tree is a spruce is not difficult; evergreen needles that are more or less quadrangled, and especially the pulvinus, give it away.
White spruce is a common name for several species of spruce and may refer to: White spruce cones. Picea glauca, native to most of Canada and Alaska with limited populations in the northeastern United States; Picea engelmannii, native to the Rocky Mountains and Cascade Mountains of the United States and Canada
The seed cones closely resemble those of the Sitka spruce but are smaller and with the rounded tops of white spruce cones. [ 6 ] Between 1987 and 2000 the largest known epidemic of spruce bark beetle ( Dendroctonus rufipennis ) caused the death of 90% of white, Sitka, and hybrid Lutz spruce, almost all of the mature spruce trees, in a 3.2 ...
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Fraser recorded the development of a single white spruce tree from 1926 to 1961. Apical growth of the stem was slow from 1926 through 1936 when the tree was competing with herbs and shrubs and probably shaded by larger trees. Lateral branches began to show reduced growth and some were no longer in evidence on the 36-year-old tree.