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whitebark pine

Habit Trees to 20 m tall; mature crown compact and conic or rounded, sometimes deformed by wind.
Buds

ovoid, light red-brown, not resinous.

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.

Pollen cones

ovoid, 10–15 mm long, dark red.

Seeds

obovoid; sharp pointed, 7–12 mm long, dark brown; wingless.

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.

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.

2n

=24.

Pinus albicaulis

Pinus leiophylla

Distribution
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[BONAP county map]
[WildflowerSearch map]
[BONAP county map]
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.

Source Flora of Oregon, volume 1, page 120
Stephen Meyers
Sibling taxa
P. attenuata, P. attenuata x Pinus radiata, P. balfouriana, P. contorta, P. flexilis, P. jeffreyi, P. lambertiana, P. monophylla, P. monticola, P. muricata, P. pinaster, P. ponderosa, P. sabiniana, P. sylvestris
P. albicaulis, P. attenuata, P. attenuata x Pinus radiata, P. balfouriana, P. contorta, P. flexilis, P. jeffreyi, P. lambertiana, P. monophylla, P. monticola, P. muricata, P. pinaster, P. ponderosa, P. sabiniana, P. sylvestris
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