Pinus leiophylla |
Pinus albicaulis |
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whitebark pine |
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Habit | Trees to 20 m tall; mature crown compact and conic or rounded, sometimes deformed by wind. | |
Buds | ovoid, light red-brown, not resinous. |
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Leaves | in clusters of 5, usually upcurved, 3–7 cm × 1–2 mm, dark green to yellow-green; margins entire; adaxial surfaces whitened by stomatal bands; apex sharply sti?-pointed; sheaths deciduous. |
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Pollen cones | ovoid, 10–15 mm long, dark red. |
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Seeds | obovoid; sharp pointed, 7–12 mm long, dark brown; wingless. |
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Trunks | to 1.5 m in diameter; straight to contorted and twisted; bark whitish to gray; smooth when young, fissured into scales with age; inner bark reddish; branches horizontal to ascending, usually persistent to base; twigs orange to dark reddish brown when young, gray to gray-brown when mature, slightly roughened by scars. |
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Seed cones | ovoid to sub-globose, 4–9 cm long, gray to dark purple; erect, symmetric, sessile to short stalked, maturing in 2 years, remaining closed, generally opened by animal activity; umbos terminal; short; tip acute, prickled. |
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2n | =24. |
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Pinus leiophylla |
Pinus albicaulis |
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Distribution | ||
Discussion | Montane forests, rocky soils near timberline. 1300–2800 m. BR, BW, Casc, ECas, Sisk. CA, ID, NV, WA; north to British Columbia, northeast to Alberta, east to WY. Native. The cones of this species remain closed and are generally ripped open by animals, and in this manner the seeds are dispersed. |
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Source | Flora of Oregon, volume 1, page 120 Stephen Meyers |
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Sibling taxa | ||
Web links |
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