Pinus engelmannii
Pinus jeffreyi
Apache pine, Arizona longleaf pine, pino real
Jeffrey pine
dark brown, at maturity deeply furrowed, ridges becoming yellowish, of narrow, elongate, scaly plates.
yellow-brown to cinnamon, deeply furrowed and cross-checked, forming large irregular scaly plates.
straight to ascending;
twigs stout (1–2cm thick), pale gray-brown, aging darker brown, rough.
spreading-ascending;
twigs stout (to 2cm thick), purple-brown, often glaucous, aging rough.
ovoid-conic, to 2cm, resinous;
scale margins pale fringed.
ovoid, tan to pale red-brown, 2–3cm, not resinous;
scale margins conspicuously fringed.
3(–5) per fascicle, spreading-ascending, often drooping, forming a brush at twig tips, persisting 2 years, (20–)25–45cm × 2mm, dull green, all surfaces with fine stomatal lines, margins coarsely serrulate, apex conic-subulate;
sheath 3–4cm, base persistent.
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.
cylindric, ca. 25mm, yellow to yellow-brown.
lance-cylindric, 20–35mm, yellow to yellow- or purple-brown or yellow.
cones maturing in 2 years and shedding seeds soon thereafter, not persistent, terminal, sometimes curved, often asymmetric, lance-ovoid before opening, ovoid when open, 11–14cm, light dull brown, nearly sessile or short-stalked;
apophyses rhombic, somewhat to quite elongate, strongly raised toward outer cone base, sometimes curved, strongly cross-keeled, narrowed to thick, curved, broadly triangular-based umbo, this often producing outcurved claw.
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.
=24.
=24.
Pinus engelmannii
Pinus jeffreyi
In general appearance Pinus engelmannii much resembles P. palustris with its short-persistent, long leaves (but in this species drooping) and in its tendency to form a grass stage. It has a deep taproot as do P. palustris and P. ponderosa.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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.)
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