Pinus engelmannii
Apache pine, Arizona longleaf pine, pino real
dark brown, at maturity deeply furrowed, ridges becoming yellowish, of narrow, elongate, scaly plates.
straight to ascending;
twigs stout (1–2cm thick), pale gray-brown, aging darker brown, rough.
ovoid-conic, to 2cm, resinous;
scale margins pale 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.
cylindric, ca. 25mm, yellow to yellow-brown.
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.
=24.
Pinus engelmannii
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.)
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