Pinus monticola
Gerald D. Carr

Flora of Oregon

Trees to 70 m tall; mature crown conic.

Trunks to 2.5 m in diameter, straight; bark gray, forming scaly plates; branches spreading and ascending; twigs reddish brown, smooth.

Buds ellipsoid to cylindric, reddish brown, resinous.

Leaves in clusters of 5, straight, slightly twisted, 4–10 cm × 0.7–1 mm, blue-green, margins finely serrulate; abaxial surface without stomatal lines; adaxial surface with stomatal lines; apex acute; sheaths deciduous.

Pollen cones ellipsoid, 10–15 mm long, yellow.

Seed cones lanceoloid to cylindric, symmetric, 10–25 cm long, brown to yellowish, pendent, stalks less than 2 cm long, maturing in 2 years, opening at maturity; umbos terminal, depressed.

Seeds obovoid, 5–7 mm long, reddish brown, wings about 4 times as long as body.

2n=24.

Montane forests, wetlands. 400–2500 m. BR, BW, Casc, CR, ECas, Sisk. CA, ID, NV, WA; north to British Columbia, northeast to MT. Native.

Pinus monticola is the state tree of Idaho.

Flora of North America

as described under Pinus monticola

Trees to 70m; trunk to 2.5m diam., straight; crown narrowly conic, becoming broad and flattened. Bark gray, distinctly platy, plates scaly. Branches nearly whorled, spreading-ascending; twigs slender, pale red-brown, rusty puberulent and slightly glandular (rarely glabrous), aging purple-brown or gray, smooth. Buds ellipsoid or cylindric, rust-colored, 0.4--0.5cm, slightly resinous. Leaves 5 per fascicle, spreading to ascending, persisting 3--4 years, 4--10cm ´ 0.7--1mm, straight, slightly twisted, pliant, blue-green, abaxial surface without evident stomatal lines, adaxial surfaces with evident stomatal lines, margins finely serrulate, apex broadly to narrowly acute; sheath 1--1.5cm, shed early. Pollen cones ellipsoid, 10--15mm, yellow. Seed cones maturing in 2 years, shedding seeds and falling soon thereafter, clustered, pendent, symmetric, lance-cylindric to ellipsoid-cylindric before opening, broadly lanceoloid to ellipsoid-cylindric when open, 10--25cm, creamy brown to yellowish, without purple or gray tints, resinous, stalks to 2cm; umbo terminal, depressed. Seeds compressed, broadly obovoid-deltoid; body 5--7mm, red-brown; wing 2--2.5cm. 2 n =24.Montane moist forests, lowland fog forests; 0--3000m; Alta., B.C.; Calif., Idaho, Mont., Nev., Oreg., Wash.Pinus monticola is the most important western source for matchwood. Its wood lacks the sugary exudates seen in P . lambertiana .Western white pine ( Pinus monticola ) is the state tree of Idaho.

Photo images

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Herbarium specimens

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