Description
The white spruce is a large coniferous evergreen tree which grows normally to 15 to 30 metres (49 to 98 ft) tall, but can grow up to 40 metres (130 ft) tall with a trunk diameter of up to 1 metre (3.3 ft). The bark is thin and scaly, flaking off in small circular plates 5 to 10 centimetres (2.0 to 3.9 in) across. The crown is narrow - conic in young trees, becoming cylindric in older trees. The shoots are pale buff-brown, glabrous (hairless) in the east of the range, but often pubescent in the west, and with prominent pulvini. The leaves are needle-like, 12 to 20 millimetres (0.47 to 0.79 in) long, rhombic in cross-section, glaucous blue-green above with several thin lines of stomata, and blue-white below with two broad bands of stomata.
The cones are pendulous, slender, cylindrical, 3 to 7 centimetres (1.2 to 2.8 in) long and 1.5 centimetres (0.59 in) wide when closed, opening to 2.5 centimetres (0.98 in) broad. They have thin, flexible scales 15 millimetres (0.59 in) long, with a smoothly rounded margin. They are green or reddish, maturing to pale brown 4 to 8 months after pollination. The seeds are black, 2 to 3 millimetres (0.079 to 0.12 in) long, with a slender, 5 to 8 millimetres (0.20 to 0.31 in) long pale brown wing.
Read more about this topic: Picea Glauca
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