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singleleaf pine

lodgepole pine, shore pine

Habit Trees to 45 m tall; mature crown variable.
Buds

ovoid; reddish brown, resinous.

Leaves

in clusters of 2; straight to slightly curved, twisted, 2–8 cm × 0.7–2.5 mm, dark green to yellow-green;

margins finely serrulate; all surfaces with fine stomatal bands;

apex usually acute;

sheaths persistent.

Pollen cones

ellipsoid to cylindrical, 0.5–1.5 cm long, orange-red.

Seeds

obovoid, oblique and tapering at apex and base, 2–6 mm long, brown or reddish brown with black spots;

wings at least twice as long as body.

Trunks

to 0.8 m in diameter; straight to contorted;

bark orange-brown to reddish brown, fissured to plated;

branches descending to ascending;

twigs yellowish orange when young; dark reddish brown with age, roughened by bud scales.

Seed cones

ovoid to sub-globose, asymmetric, 2–5 cm long, light brown to reddish brown, pendent;

stalks less than 1 cm long, maturing in 2 years, opening at maturity;

umbos central, triangular; less than 5 mm;

prickles less than 5 mm long.

2n

=24.

Pinus monophylla

Pinus contorta

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

[This taxon does not have a floristic treatment in Flora of Oregon.]

Western North America. 3 varieties; 2 varieties treated in Flora.

With the exception of Pinus sylvestris, which one is unlikely to encounter in the wild, P. contorta is the only two-needled pine species found in Oregon.

Source Flora of Oregon, volume 1 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. monticola, P. muricata, P. pinaster, P. ponderosa, P. sabiniana, P. sylvestris
P. albicaulis, P. attenuata, P. attenuata x Pinus radiata, P. balfouriana, P. flexilis, P. jeffreyi, P. lambertiana, P. monophylla, P. monticola, P. muricata, P. pinaster, P. ponderosa, P. sabiniana, P. sylvestris
Subordinate taxa
P. contorta var. contorta, P. contorta var. latifolia
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