Pinus strobus
Pinus muricata
eastern white pine, northern white pine, pin blanc, soft pine, Weymouth pine, white pine
Bishop pine
gray-brown, deeply furrowed, with long, irregularly rectangular, scaly plates.
dark gray, deeply furrowed, ridges long, scaly-plated.
whorled, spreading-upswept;
twigs slender, pale red-brown, glabrous or pale puberulent, aging gray, ±smooth.
spreading-ascending, often contorted;
twigs stout to slender, orange-brown, aging darker brown, rough.
ovoid-cylindric, light red-brown, 0.4–0.5cm, slightly resinous.
ovoid-cylindric, dark brown, 1–2.5cm, resinous.
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.
2 per fascicle, spreading to upcurved, persisting 2–3 years, 8–15cm × (1.2–)1.5(–2)mm, slightly twisted, dark yellow-green, all surfaces with stomatal lines, margins strongly serrulate, apex abruptly conic-acute;
sheath to 1.5cm, base persistent.
ellipsoid, 10–15mm, yellow.
ellipsoid, to 5mm, orange.
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.
cones maturing in 3 years, serotinous, long-persistent, mostly in whorls, mostly asymmetric, lanceoloid-ovoid before opening, curved-ovoid when open, 4–9cm, glossy bright to pale red-brown, sessile or on stalks to 1cm, mostly downcurved, scales with deep red-brown border distally on adaxial surface;
apophyses much thickened, the abaxial ones progressively more angulately dome-shaped toward base of cone;
umbo central, a stout-based, curved claw.
=24.
=24.
Pinus strobus
Pinus muricata
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.)
The several varieties described for Pinus muricata reflect the high variability in leaf characters and in degree of elaboration of apophysis and umbo in this species. The extremes can sometimes occur together.
Of conservation concern.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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