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limber pine

Habit Trees to 20 m tall; mature crown conic to rounded.
Buds

ovoid; reddish brown, resinous.

Leaves

in clusters of 5, upcurved, 3–6 cm × 1–1.5 mm, dark green;

margins entire to finely serrulate;

abaxial surfaces with faint stomatal bands;

adaxial surfaces with obvious stomatal bands;

apex acute;

sheaths deciduous.

Pollen cones

ellipsoid-cylindrical, 1.2–1.6 cm long, red or yellow.

Seeds

oval, compressed, 6–12 mm long, brown to reddish brown, sometimes with spots; wingless or nearly so.

Trunks

to 2 m in diameter; straight, sometimes contorted;

bark gray; smooth, becoming ridged with rectangular scaly plates with age;

branches horizontal to ascending, usually persistent to base;

twigs reddish brown and pubescent when young, becoming gray with age; smooth or nearly so with some bud scars.

Seed cones

ovoid to ovoid-cylindrical, symmetric, 7–15 cm long, light brown; horizontal to pendent, sessile to less than 2 cm long, maturing in 2 years, opening at maturity;

umbos terminal; less than 2 mm;

prickles absent.

2n

=24.

Pinus rigida

Pinus flexilis

Distribution
[WildflowerSearch map]
[BONAP county map]
[WildflowerSearch map]
[BONAP county map]
Discussion

High altitude montane forests. 1500–2500 m. BW. CA, ID, NV, WA; north to Alberta, east to NE, southeast to NM. Native.

In Oregon, Pinus flexilis is found only in the Wallowa Mountains. Morphologically, it is similar to P. albicaulis but is distinguished from the latter by its larger cones that open at maturity.

Source Flora of Oregon, volume 1, page 121
Stephen Meyers
Sibling taxa
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
P. albicaulis, P. attenuata, P. attenuata x Pinus radiata, P. balfouriana, P. contorta, P. jeffreyi, P. lambertiana, P. monophylla, P. monticola, P. muricata, P. pinaster, P. ponderosa, P. sabiniana, P. sylvestris
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