Pinus engelmannii
Pinus elliottii
Apache pine, Arizona longleaf pine, pino real
slash pine
dark brown, at maturity deeply furrowed, ridges becoming yellowish, of narrow, elongate, scaly plates.
orange- to purple-brown, irregularly furrowed and cross-checked into large, irregularly rectangular, papery-scaly plates.
straight to ascending;
twigs stout (1–2cm thick), pale gray-brown, aging darker brown, rough.
spreading to ascending;
twigs stout (to ca. 1cm thick), orange-brown, aging darker brown, rough-scaly.
ovoid-conic, to 2cm, resinous;
scale margins pale fringed.
cylindric, silvery brown, 1.5–2cm;
scale margins 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.
2 or 3 per fascicle, spreading or ascending, persisting ca. 2 years, 15–20(–23)cm × 1.2–1.5mm, straight, slightly twisted, pliant, yellow- to blue-green, all surfaces with stomatal lines, margins finely serrulate, apex abruptly acute to acuminate;
sheath 1–2cm, base persistent.
cylindric, ca. 25mm, yellow to yellow-brown.
cylindric, 30–40mm, purplish.
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, falling the year after seed-shed, single or in pairs, symmetric, lance-ovoid before opening, ovoid or ovoid-cylindric when open, (7–)9–18(–20)cm, light chocolate brown, on stalks to 3cm;
apophyses lustrous (as if varnished), slightly raised, strongly cross-keeled;
umbo central, depressed-pyramidal, with short, stout prickle.
=24.
Pinus engelmannii
Pinus elliottii
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.)
Varieties 2 (native only in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Seedlings essentially without grass stage, buds thus scattered on the stem; leaves mostly in 3s, sometimes in 2s on same shoot; resin canals 3-5 per leaf; base of open cone ± truncate. | var. elliottii |
1. Seedlings tending toward a grass stage, buds thus crowded on contracted stems; leaves mostly in 2s, sometimes in 3s on same shoot; resin canals 3-9 per leaf; base of open cone rounded. | var. densa |
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