Pinus flexilis
Pinus washoensis
limber pine, pin blanc de l'ouest
Washoe pine
gray, nearly smooth, cross-checked in age into scaly plates and ridges.
yellow-brown to reddish, fissured, plates scaly.
spreading to ascending, often persistent to trunk base;
twigs pale red-brown, puberulous (rarely glabrous), slightly resinous, aging gray, smooth.
spreading-ascending;
twigs stout, orangish, aging gray, rough.
ovoid, light red-brown, 0.9–1cm, resinous;
lower scales ciliolate along margins.
ovoid, red-brown, 1.5–2cm, not resinous;
scale margins fringed.
5 per fascicle, spreading to upcurved and ascending, persisting 5–6 years, 3–7cm × 1–1.5mm, pliant, dark green, abaxial surface with less conspicuous stomatal bands than adaxial surfaces, adaxial surfaces with strong, pale stomatal bands, margins finely serrulate, apex conic-acute to acuminate;
sheath 1–1.5(–2)cm, shed early.
(2–)3 per fascicle, spreading-ascending, persisting (2–)4–6(–7) years, 10–15cm × ca. 1.5mm, slightly twisted, gray-green, all surfaces with stomatal lines, margins finely serrulate, apex acuminate;
sheath 1–2cm, base persistent.
broadly ellipsoid-cylindric, ca. 15mm, pale red or yellow.
cylindric, 10–20mm, red-purple.
cones maturing in 2 years, shedding seeds and falling soon thereafter, spreading, symmetric, lance-ovoid before opening, cylindro-ovoid when open, 7–15cm, straw-colored, resinous, sessile to short-stalked, apophyses much thickened, strongly cross-keeled, umbo terminal, depressed.
cones maturing in 2 years, shedding seeds soon thereafter, not persistent, spreading, slightly asymmetric, ovoid-conic before opening, broadly ovoid when open, 7–10cm, tan or pale red-brown, sessile, abaxial surface of scales darker and sharply contrasting in color with adaxial surface;
apophyses slightly raised, low pyramidal;
umbo central, narrowly pyramidal, tapering into short, reflexed, fine prickle.
=24.
=24.
Pinus flexilis
Pinus washoensis
Pinus flexilis, much branched with a strongly tapering trunk, is little utilized because of its form and relative inaccessibility. It reportedly forms intermediates with P. strobiformis where the two overlap. The fresh-cut wood has the odor of turpentine.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Pinus washoensis often occurs in large stands and resembles P. jeffreyi. The number and posture of seed-cone scales fall within the ranges given for P. jeffreyi. The abaxial surface of these scales has a significantly darker pigmentation, however; such a color contrast is not apparent in P. jeffreyi. Forest geneticists have developed hybrids between P. washoensis and related yellow pines, but no natural hybrids have been observed. Some workers regard P. washoensis as closely related to—or even conspecific with--- P. ponderosa.
Of conservation concern.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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