Pinus monticola |
Pinus clausa |
|
---|---|---|
pin argenté, western white pine |
sand pine, scrub pine, spruce pine |
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Habit | Trees to 70m; trunk to 2.5m diam., straight; crown narrowly conic, becoming broad and flattened. | Trees to 21m; trunk to 0.5m diam., straight and erect to leaning and crooked, much branched; crown mostly rounded or irregular. |
Bark | gray, distinctly platy, plates scaly. |
gray to gray-brown, furrowed, with narrow, flat, irregular ridges, resin pockets absent, on upper sections of the trunk reddish to red-brown, platy becoming smooth distally. |
Branches | nearly whorled, spreading-ascending; twigs slender, pale red-brown, rusty puberulent and slightly glandular (rarely glabrous), aging purple-brown or gray, smooth. |
spreading to ascending, poorly self-pruning; twigs slender, violet- to red-brown, rarely glaucous, aging gray, smooth. |
Buds | ellipsoid or cylindric, rust-colored, 0.4–0.5cm, slightly resinous. |
cylindric, purple-brown, to 1cm; scale margins white-fringed. |
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. |
2 per fascicle, spreading-ascending, persisting 2–3 years, (3–)6–9(–10)cm × ca. 1mm, straight, slightly twisted, dark green, all surfaces with fine, inconspicuous stomatal lines, margins finely serrulate, apex short-conic; sheath 0.3–0.5(–0.7)cm, base persistent. |
Pollen cones | ellipsoid, 10–15mm, yellow. |
ellipsoid, ca. 10mm, brownish yellow. |
Seed(s) | 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. |
cones maturing in 2 years, shedding seeds soon thereafter or often long-serotinous, long-persistent, solitary or whorled, spreading, symmetric (rarely slightly asymmetric, reflexed), lanceoloid before opening, ovoid to broadly ovoid when open, 3–8cm, red-brown, sessile or on stalks to 1cm, scales with dark red-brown, purple, or purple-gray border distally on adaxial surface; apophyses thickened, shallowly and angulately raised, transversely rhombic, cross-keeled; umbo central, low-pyramidal, tapering to sharp tip or weak, often deciduous prickle. |
2n | =24. |
=24. |
Pinus monticola |
Pinus clausa |
|
Habitat | Montane moist forests, lowland fog forests | Fire successional in sand dunes and white sandhills |
Elevation | 0–3000m (0–9800ft) | 0–60m (0–200ft) |
Distribution |
CA; ID; MT; NV; OR; WA; AB; BC
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AL; FL
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Discussion | 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. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Although Pinus clausa is too profusely branched to be important for saw timber, it is managed to produce a high volume of pulpwood in northern peninsular Florida. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 2. | FNA vol. 2. |
Parent taxa | Pinaceae > Pinus | Pinaceae > Pinus |
Sibling taxa | ||
Synonyms | Strobus monticola | P. inops var. clausa, P. clausa var. immuginata |
Name authority | Douglas ex D. Don: in Lambert, Descr. Pinus [ed. 3] 2: unnumbered page between 144 and 145. (1832) | (Chapman ex Engelmann) Sargent: Rep. For. N. America 199. (1884) |
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