Flora of North America species comparison

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

red-brown to dark brown, shallowly and irregularly furrowed, ridges broad, scaly.

descending to spreading-ascending;

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

spreading-ascending;

twigs red-brown, sometimes finely papillate, aging gray to gray-brown.

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

scale margins white-fringed.

ovoid to short cylindric, pale red-brown, 0.5–1.2cm, slightly resinous.

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.

(2–)3(–4) per fascicle, spreading to upcurved, persisting 3–4 years, 2–6cm × 0.6–0.9(–1)mm, connivent, 2–3-sided, blue- to gray-green, abaxial surface not conspicuously whitened with stomatal bands or if stomatal bands present, these less conspicuous than on adaxial surfaces, often with 2 subepidermal resin bands evident, adaxial surfaces conspicuously whitened with stomatal lines, margins entire to finely serrulate, apex narrowly conic or subulate;

sheath 0.5–0.7cm, scales soon recurved, forming rosette, shed early.

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

ellipsoid, to 10mm, 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 maturing in 2 years, shedding seeds and falling soon thereafter, spreading, symmetric, ovoid before opening, broadly depressed-ovoid to nearly globose when open, 1–3.5cm, pale yellow- to pale red-brown, resinous, nearly sessile or short-stalked;

apophyses thickened, slightly domed, angulate, transversely keeled;

umbo subcentral, slightly raised to depressed, truncate or umbilicate.

=24.