Pinus contorta var. latifolia

Engelmann in S. Watson

in S. Watson,Botany (Fortieth Parallel) 331. 1871.

Common names: Lodgepole pine
Endemic
Synonyms: Pinus contorta subsp. latifolia (Engelmann) Critchfield
Treatment appears in FNA Volume 2.

Trees to 46m; trunk to 0.8m diam., mostly straight and evenly tapering, or at or above timberline reduced to shrub form by wind shear; crown usually conic at maturity. Bark gray to redbrown, not evidently furrowed, separating into loose plates. Branches mostly horizontally spreading, not ascending at tip. Leaves (4–) 5–8cm × 1–2 (–3) mm, yellow-green, apex narrowly acute to short-acuminate. Seed-cones maturing in 2 years, then shedding seeds or variously serotinous, long-persistent, strongly asymmetric, mostly recurved, seldom whorled, mostly in 2s or solitary, mid and lower apophyses mostly much domed.


Habitat: Low to high montane forests, often to timberline
Elevation: 0–3500m

Distribution

V2 406-distribution-map.gif

Alta., B.C., N.W.T., Sask., Yukon, Alaska, Colo., Idaho, Mont., Oreg., S.Dak., Utah, Wash., Wyo.

Discussion

Pinus contorta var. latifolia is fire successional. It is the most wide-ranging and commercially utilized variety. Its poor self-pruning character makes it less desirable for lumber but adequate for mine timbers, fences, and pulpwood.

Lodgepole pine (Pinus contorta var. latifolia) is the provincial tree of Alberta.

Selected References

None.

Lower Taxa

None.

"relatively thin" is not a number.

resinous +
narrowly acute +  and short-acuminate +
mammillate +, cross-keeled +, elongate +  and rhombic +
Robert Kral +
Engelmann in S. Watson +
gray;redbrown +
black +, mottled with black +  and redbrown +
5 cm50 mm <br />0.05 m <br /> (?) +
not ascending +  and spreading +
resinous +
dark redbrown +
conspicuous +
0 cm0 mm <br />0 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
Lodgepole pine +
Alta. +, B.C. +, N.W.T. +, Sask. +, Yukon +, Alaska +, Colo. +, Idaho +, Mont. +, Oreg. +, S.Dak. +, Utah +, Wash. +  and Wyo. +
0–3500m +
sheathed +  and sessile +
rounded +, 2-3-angled +  and terete +
Low to high montane forests, often to timberline +
arranged +  and fascicles +
4 cm40 mm <br />0.04 m <br /> (5 cm50 mm <br />0.05 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
yellow-green +
persisting +
5 cm50 mm <br />0.05 m <br /> (8 cm80 mm <br />0.08 m <br />) +
ascending;spreading +
3 (?) +  and 8 (?) +
scale-like +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
not winged +  and 2-winged +
ellipsoid +  and cylindric +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
barely elongate;stubby +
0 cm0 mm <br />0 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
in S. Watson,Botany (Fortieth Parallel) +
fibrous;woody +
arranged +  and overlapping +
persistent +
flattened +
pliable +  and woody +
long-persistent +
wingless +, winged +, stalked +  and sessile +
persistent +
pendent;more or less erect +
obovoid;compressed +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
persistent +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
reduced;well-defined short +
extended +
Pinus contorta subsp. latifolia +
Pinus contorta var. latifolia +
Pinus contorta +
variety +
decurrent +  and elongate +
straight +
tapering +
reduced +
darker brown +, orange +  and redbrown +
slender +
depressed-triangular +
reduced +
1 cm10 mm <br />0.01 m <br /> (?) +  and 1.4 cm14 mm <br />0.014 m <br /> (?) +