Pinus engelmannii
Pinus serotina
Apache pine, Arizona longleaf pine, pino real
marsh pine, pocosin pine, pond pine
dark brown, at maturity deeply furrowed, ridges becoming yellowish, of narrow, elongate, scaly plates.
red-brown, irregularly furrowed and cross-checked into rectangular, flat, scaly plates.
straight to ascending;
twigs stout (1–2cm thick), pale gray-brown, aging darker brown, rough.
spreading to ascending;
twigs stout, orange- to yellow-orange, frequently glaucous, aging darker.
ovoid-conic, to 2cm, resinous;
scale margins pale fringed.
ovoid to narrowly ovoid, red-brown, 1–1.5(–2)cm, resinous.
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 (to 5 in adventitious or disturbed growth), spreading to ascending, persisting 2–3 years, (12–)15–20(–21)cm × 1.3–1.5(–2)mm, slightly twisted, tufted at twig tips, straight, yellow-green, all surfaces with fine stomatal lines, margins serrulate, apex acuminate;
sheath 1–2cm, base persistent.
cylindric, ca. 25mm, yellow to yellow-brown.
cylindric, to 30mm, 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.
cones maturing in 2 years, in some populations beginning to shed seeds then but more often variably serotinous, long-persistent, often whorled, symmetric, ovoid to lanceoloid before opening, broadly ovoid to nearly globose when open, 5–8cm, pale red-brown to creamy brown, sessile or on stalks to 1cm, scales with dark red-brown border on adaxial surface distally;
apophyses slightly thickened, low, rhombic, low cross-keeled;
umbo central, low-conic, with short, weak prickle, sometimes unarmed.
=24.
=24.
Pinus engelmannii
Pinus serotina
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 serotina is fire successional and sprouts adventitiously after crown fires. It is part of a distinct forest type including Taxodium distichum (Linnaeus) Richard, Nyssa biflora Walter, Magnolia virginiana Linnaeus, Persea sp., and Ilex sp. Of good form when protected from fire, P. serotina then much resembles P. taeda, with which it hybridizes naturally. It is of increasing importance as pulpwood.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
WildflowerSearch
iNaturalist
USDA Plants Database
MD Biodiversity
