Pinus longaeva
Pinus strobus
bristlecone pine, Great Basin bristlecone pine, intermountain bristlecone pine
eastern white pine, northern white pine, pin blanc, soft pine, Weymouth pine, white pine
red-brown, shallowly to deeply fissured with thick, scaly, irregular, blocky ridges.
gray-brown, deeply furrowed, with long, irregularly rectangular, scaly plates.
contorted, pendent;
twigs pale red-brown, aging gray to yellow-gray, puberulent, young branches resembling long bottlebrushes because of persistent leaves.
whorled, spreading-upswept;
twigs slender, pale red-brown, glabrous or pale puberulent, aging gray, ±smooth.
ovoid-acuminate, pale red-brown, ca. 1cm, resinous.
ovoid-cylindric, light red-brown, 0.4–0.5cm, slightly resinous.
mostly 5 per fascicle, upcurved, persisting 10–30 years, 1.5–3.5cm × 0.8–1.2mm, mostly connivent, deep yellow-green, with few resin splotches but often scurfy with pale scales, abaxial surface without median groove but with 2 subepidermal but evident resin bands, adaxial surfaces conspicuously whitened with stomates, margins entire or remotely and finely serrulate distally, apex bluntly acute to short-acuminate;
sheath ca. 1cm, soon forming rosette, shed early.
5 per fascicle, spreading to ascending, persisting 2–3 years, 6–10cm × 0.7–1mm, straight, slightly twisted, pliant, deep green to blue-green, pale stomatal lines evident only on adaxial surfaces, margins finely serrulate, apex abruptly acute to short-acuminate;
sheath 1–1.5cm, shed early.
cylindro-ellipsoid, 7–10mm, purple-red.
ellipsoid, 10–15mm, yellow.
cones maturing in 2 years, shedding seeds and falling soon thereafter, spreading, symmetric, lance-cylindric with rounded base before opening, lance-cylindric to narrowly ovoid when open, 6–9.5cm, purple, aging red-brown, nearly sessile;
apophyses much thickened, sharply keeled;
umbo central, raised on low buttress, truncate to umbilicate, abruptly narrowed to slender but stiff, variable prickle 1–6mm, resin exudate pale.
cones maturing in 2 years, shedding seeds and falling soon thereafter, clustered, pendent, symmetric, cylindric to lance-cylindric or ellipsoid-cylindric before opening, ellipsoid-cylindric to cylindric or lance-cylindric when open, (7–)8–20cm, gray-brown to pale brown, with purple or gray tints, stalks 2–3cm;
apophyses slightly raised, resinous at tip;
umbo terminal, low.
=24.
Pinus longaeva
Pinus strobus
Pinus longaeva is considered by dendrochronologists to be the longest-lived tree. One tree was estimated to be 5000 years old.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Pinus strobus is an important timber tree; because of extensive lumbering, few uncut stands remain. It was once prized as a source for ship masts, and large tracts of it were reserved for the Royal Navy during colonial times.
Pinus strobus var. chiapensis appears to be as Martínez saw it: a clinal variant that, compared to the type variety, has finer leaves, different resin canal distribution, and heavier cones when cones of similar sizes are compared.
Eastern white pine (Pinus strobus) is the provincial tree of Ontario and the state tree of Maine and Michigan.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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