Pinus monticola
Pinus cembroides
pin argenté, western white pine
Mexican pinyon, pino piñonero, piñón
gray, distinctly platy, plates scaly.
red-brown to dark brown, shallowly and irregularly furrowed, ridges broad, scaly.
nearly whorled, spreading-ascending;
twigs slender, pale red-brown, rusty puberulent and slightly glandular (rarely glabrous), aging purple-brown or gray, smooth.
spreading-ascending;
twigs red-brown, sometimes finely papillate, aging gray to gray-brown.
ellipsoid or cylindric, rust-colored, 0.4–0.5cm, slightly resinous.
ovoid to short cylindric, pale red-brown, 0.5–1.2cm, slightly resinous.
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–)3(–4) per fascicle, spreading to upcurved, persisting 3–4 years, 2–6cm × 0.6–0.9(–1)mm, connivent, 2–3-sided, blue- to gray-green, abaxial surface not conspicuously whitened with stomatal bands or if stomatal bands present, these less conspicuous than on adaxial surfaces, often with 2 subepidermal resin bands evident, adaxial surfaces conspicuously whitened with stomatal lines, margins entire to finely serrulate, apex narrowly conic or subulate;
sheath 0.5–0.7cm, scales soon recurved, forming rosette, shed early.
ellipsoid, 10–15mm, yellow.
ellipsoid, to 10mm, yellow.
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 and falling soon thereafter, spreading, symmetric, ovoid before opening, broadly depressed-ovoid to nearly globose when open, 1–3.5cm, pale yellow- to pale red-brown, resinous, nearly sessile or short-stalked;
apophyses thickened, slightly domed, angulate, transversely keeled;
umbo subcentral, slightly raised to depressed, truncate or umbilicate.
=24.
=24.
Pinus monticola
Pinus cembroides
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.)
Pinus cembroides is the common pinyon of Mexican commerce. Populations of the Edwards Plateau, Texas, are disjunct about 150km east and north of the main area of distribution of the species, and they have been described as a distinct variety, P. cembroides var. remota Little, on the basis of thin seed shell and a higher frequency of 2-leaved fascicles in contrast to the thicker seed shell and prevalently 3-leaved fascicles in Mexican pinyon populations to the west and south. The strong overlap in nearly all character states between the populations of the Edwards Plateau and other populations makes var. remota difficult to maintain.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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