Flora of North America species comparison

yellow- to red-brown, deeply irregularly furrowed, cross-checked into broadly rectangular, scaly plates.

descending to spreading-ascending;

twigs stout (to 2cm thick), orange-brown, aging darker orange-brown, rough.

mostly red-brown, rarely glaucous.

ovoid, to 2cm, fully 1cm broad, red-brown, very resinous;

scale margins white-fringed.

2–5 per fascicle, spreading to erect, persisting (2–)4–6(–7) years, 7–25(–30)cm × (1–)1.2–2mm, slightly twisted, tufted at twig tips, pliant, deep yellow-green, all surfaces with evident stomatal lines, margins serrulate, apex abruptly to narrowly acute or acuminate;

sheath 1.5–3cm, base persistent.

mainly 2–3 per fascicle, (7–)10–17cm × (1.2–)1.4–2mm.

ellipsoid-cylindric, 1.5–3.5cm, yellow or red.

yellow.

cones maturing in 2 years, shedding seeds soon thereafter, leaving rosettes of scales on branchlets, solitary or rarely in pairs, spreading to reflexed, symmetric to slightly asymmetric, conic-ovoid before opening, broadly ovoid when open, 5–15cm, mostly reddish brown, sessile to nearly sessile, scales in steep spirals (as compared to Pinus jeffreyi) of 5–7 per row as viewed from side, those of cones just prior to and after cone fall spreading and reflexed, thus well separate from adjacent scales;

apophyses dull to lustrous, thickened and variously raised and transversely keeled;

umbo central, usually pyramidal to truncated, rarely depressed, merely acute, or with a very short apiculus, or with a stout-based spur or prickle.

cones mostly symmetric, 5–10cm;

apophyses of fertile scales moderately raised;

umbo low pyramidal, narrowing acuminately to a stout-based prickle or short sharp spur.;

seed body 3–4mm;

wing to 15mm.