Flora of North America species comparison

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

gray-brown, deeply furrowed, with long, irregularly rectangular, scaly plates.

descending to spreading-ascending;

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

whorled, spreading-upswept;

twigs slender, pale red-brown, glabrous or pale puberulent, aging gray, ±smooth.

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

scale margins white-fringed.

ovoid-cylindric, light red-brown, 0.4–0.5cm, 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.

5 per fascicle, spreading to ascending, persisting 2–3 years, 6–10cm × 0.7–1mm, straight, slightly twisted, pliant, deep green to blue-green, pale stomatal lines evident only on adaxial surfaces, margins finely serrulate, apex abruptly acute to short-acuminate;

sheath 1–1.5cm, shed early.

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

ellipsoid, 10–15mm, 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, clustered, pendent, symmetric, cylindric to lance-cylindric or ellipsoid-cylindric before opening, ellipsoid-cylindric to cylindric or lance-cylindric when open, (7–)8–20cm, gray-brown to pale brown, with purple or gray tints, stalks 2–3cm;

apophyses slightly raised, resinous at tip;

umbo terminal, low.

=24.