Flora of North America species comparison

light red-brown, furrowed and cross-checked into irregularly rectangular, scaly plates.

gray, fissured and cross-checked into elongate, irregular, scaly plates, resin pockets absent, on upper sections of trunk ± smooth, gray, looking slick.

spreading-ascending;

twigs moderately slender (to 1cm thick), orange- to red-brown, aging darker brown, rough.

whorled, spreading to ascending;

twigs slender, purple-red to red-brown, occasionally glaucous, aging gray, smooth.

ovoid-acuminate, red-brown, to ca. 2cm, resinous;

scale margins fringed.

ovoid to ovoid-cylindric, red-brown, ca. 0.5–1cm, slightly resinous;

scale margins finely fringed.

2 per fascicle, straight or slightly twisted, brittle, breaking cleanly when bent, deep yellow-green, all surfaces with narrow stomatal bands, margins serrulate, apex short-conic, acute;

sheath 1–2.5cm, base persistent.

2 per fascicle, spreading to ascending, persisting 2–3 years, 4–8(–10)cm × 0.7–1.2mm, straight, slightly twisted, dark green, all surfaces with fine stomatal lines, margins finely serrulate, apex sharply conic;

sheath 0.5–1cm, base persistent.

ellipsoid, ca. 15mm, dark purple.

lance-cylindric, 10–15mm, purple-brown.

cones maturing and opening in 2 years, spreading, symmetric, ovoid before opening, broadly ovoid to nearly globose when open, 3.5–6cm, light red-brown, nearly sessile;

apophyses slightly thickened, slightly raised, transversely low-keeled;

umbo central, centrally depressed, unarmed.

cones maturing in 2 years, shedding seeds soon thereafter, semipersistent, spreading to recurved, nearly symmetric, lance-ovoid before opening, ovoid-cylindric when open, 3.5–7cm, red-brown, aging gray, nearly sessile or on stalks to 1cm, scales lacking contrasting border on adaxial surfaces (as in P. echinata);

apophyses but slightly thickened and raised;

umbo central, depressed, unarmed or with small, curved, weak, deciduous, short-incurved prickle.

=24.

=24.