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Picea mariana

Picea mariana
Black spruce stand at Arctic Chalet, Inuvik, NT.jpg
Stand of black spruce near Inuvik, Northwest Territories, Canada
Scientific classification
Kingdom: Plantae
Division: Pinophyta
Class: Pinopsida
Order: Pinales
Family: Pinaceae
Genus: Picea
Species: P. mariana
Binomial name
Picea mariana
(Mill.) Britton, Sterns & Poggenburg
Picea mariana levila.png
Synonyms

Picea mariana (black spruce) is a North American species of spruce tree in the pine family. It is widespread across Canada, found in all 10 provinces and all 3 Arctic territories. Its range extends into northern parts of the United States: in Alaska, the Great Lakes region, and the upper Northeast. It is a frequent part of the biome known as taiga or boreal forest.

Picea mariana is a slow-growing, small upright evergreen coniferous tree (rarely a shrub), having a straight trunk with little taper, a scruffy habit, and a narrow, pointed crown of short, compact, drooping branches with upturned tips. Through much of its range it averages 5–15 m (15–50 ft) tall with a trunk 15–50 cm (6–20 in) diameter at maturity, though occasional specimens can reach 30 m (98 ft) tall and 60 cm (24 in) diameter. The bark is thin, scaly, and grayish brown. The leaves are needle-like, 6–15 mm (14916 in) long, stiff, four-sided, dark bluish green on the upper sides, paler glaucous green below. The cones are the smallest of all of the spruces, 1.5–4 cm (121 12 in) long and 1–2 cm (1234 in) broad, spindle-shaped to nearly round, dark purple ripening red-brown, produced in dense clusters in the upper crown, opening at maturity but persisting for several years.


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Wikipedia

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