Pinus jeffreyi
Pinus taeda
Jeffrey pine
loblolly pine
yellow-brown to cinnamon, deeply furrowed and cross-checked, forming large irregular scaly plates.
red-brown, forming square or irregularly rectangular, scaly plates, resin pockets absent.
spreading-ascending;
twigs stout (to 2cm thick), purple-brown, often glaucous, aging rough.
spreading-ascending;
twigs moderately slender (to ca. 1cm thick), orangish to yellow-brown, aging darker brown, rough.
ovoid, tan to pale red-brown, 2–3cm, not resinous;
scale margins conspicuously fringed.
lance-cylindric, pale red-brown, 1–1.2(–2)cm, mostly less than 1cm broad, slightly resinous;
scale margins white-fringed, apex acuminate.
3 per fascicle, spreading-ascending, persisting (2–)4–6(–7) years, 12–22(–25)cm × ca. 1.5–2mm, slightly twisted, gray- to yellow-green, all surfaces with fine stomatal lines, margins finely serrulate, apex acute to acuminate;
sheath (1–)1.5–2.5(–3)cm, base persistent.
2–3 per fascicle, ascending to spreading, persisting 3 years, (10–)12–18(–23)cm × 1–2mm, straight, slightly twisted, pliant, deep yellow-green, all surfaces with narrow stomatal lines, margins finely serrulate, apex acute to abruptly conic-subulate;
sheath 1–2.5cm, base persistent.
lance-cylindric, 20–35mm, yellow to yellow- or purple-brown or yellow.
cylindric, 20–40mm, yellow to yellow-brown.
cones maturing in 2 years, shedding seeds and falling soon thereafter, nearly terminal, spreading, slightly asymmetric at base, ovoid-conic before opening, cylindro-ovoid when open, (10–)15–30cm, light red-brown, nearly sessile or on stalks to 0.5cm, abaxial surface of scales not darker than or sharply contrasting in color with adaxial surface, scales in low spirals (as compared to Pinus ponderosa) of 8 or more per row as viewed from side, those of cones just prior to and after cone fall not so spreading and deflexed, thus not so much separated from adjacent scales;
apophyses slightly thickened and raised, not keeled;
umbo central, slightly raised, with short, slender, reflexed prickle.
cones maturing in 2 years, shedding seeds soon thereafter, not persistent, solitary or in small clusters, nearly terminal, symmetric, lanceoloid before opening, narrowly ovoid when open, 6–12cm, mostly dull yellow-brown, sessile to nearly sessile, scales without dark border on adaxial surface distally;
apophyses dull, slightly thickened, variously raised (more so toward cone base), rhombic, strongly transversely keeled;
umbo central, recurved, stoutly pyramidal, tapering to stout-based, sharp prickle.
=24.
=24.
Pinus jeffreyi
Pinus taeda
Pinus jeffreyi has a form very similar to that of P. ponderosa, but it is a smaller species when compared with sympatric populations of the latter. It is cut and sold under the same name as P. ponderosa, but the sweetish odor of the fresh-cut wood contrasts sharply with the turpentine odor of ponderosa pine. The resin chemistry of the two species is significantly different.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Originally most races of Pinus taeda were in the lowlands. Following disturbance of the natural vegetation after settlement by Europeans, the species spread to fine-textured, fallow, upland soils, where it now occurs intermixed with P. echinata and P. virginiana. In the Southeast P. taeda is commonly used in plantation forestry, along with P. elliottii and P. echinata. Pinus taeda frequently forms hybrids with P. echinata and P. palustris (P. × sondereggeri H.H. Chapman). Commercially, it is a valuable pulpwood and timber species.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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Flora NW
PNW Herbaria
WildflowerSearch
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USDA Plants Database
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